This is Walter Summerford. This poor schmuck got struck by lightning four times, once after he was already dead.
It’s an old wives’ tale that lightning doesn’t strike twice in the same place. Lightning is completely random. In the US alone, there are an average of 40 million lightning strikes per year. The odds of being hit by lightning in America are about one in a million in a given year. However, those numbers are, curiously, not consistent around the globe.
In the UK, there are only around 300,000 lightning strikes per annum. The United Kingdom is markedly smaller than the US, but its weather is way crappier. As a result, the odds of getting struck over there are closer to 1-in-15,300.
Lightning is some seriously nasty stuff. It’s basically just a big honking spark. Electrostatic energy builds up in the atmosphere and can discharge either from cloud to cloud or from a cloud into the ground. A typical lightning bolt runs about 50,000 degrees F, or five times the temperature of the surface of the sun. They pack millions of joules of energy. That stuff is undeniably pretty to look upon. However, you really don’t want to get any of it on you.
Around the globe, there are roughly 6,000 lightning strikes each and every minute. Nearly a quarter million people are struck by lightning every year. Roughly ten percent of those are killed.
On a certain level, those seem like pretty decent odds. If only one in every million Americans gets struck by lightning every year and, of those, nine out of ten live to tell the tale, that doesn’t sound so bad.
Those are indeed reassuring numbers, unless you happen to be Walter Summerford. Walter Summerford has been described as the unluckiest man in the universe. He was struck by lightning four times. One of those strikes was actually after he was already dead.
Background
Walter Summerford served as a British officer in World War I. In 1918, Major Summerford was riding a horse through a Belgian field when he caught a bolt of lightning.
This massive electrical shock rendered the poor man paralyzed from the waist down. However, he gradually recovered. With the war over and his recovery nearly complete, Summerford was demobilized and sent to Vancouver for further rehabilitation.
Six years later, in 1924, Summerford was enjoying a little quiet time out fishing by a river. A storm came up, so the man took refuge underneath a nearby tree. A bolt of lightning struck the tree and tracked down his body and into the ground. The strike left Summerford almost completely paralyzed on his right side.
After two long years, Summerford finally regained the use of his legs. The man was an inveterate outdoorsman and loved wandering about the wilderness hiking, hunting, and fishing.
However, in 1930, whilst taking a stroll in a public park, he was struck by lightning a third time. This bolt rendered him completely paralyzed. It was also markedly worse than the previous two. Summerford was destined to spend the rest of his natural life in a hospital bed.
Summerford’s physicians were amazed the man had survived this third blow. He fought valiantly for another two years before finally succumbing to the cumulative effects of these three lightning strikes in 1932.
As to whether he enjoyed some kind of unique body chemistry or had somehow offended his Maker, no one will ever know. Regardless, it was undoubtedly the cumulative effect of these three lightning strikes that ultimately did Walter Summerford in.
Four years after he was buried in a public cemetery in Vancouver, Canada, Walther Summerford’s gravestone was itself struck by lightning and split into pieces.
I’m not much into conspiracy theories myself. However, it is tough not to believe that there was something supernatural and spooky going on with that unfortunate guy.
The truly curious bit was that Walther Summerford was struck every six years starting in 1918, just like clockwork. Even after he died, when his six years were up, that’s when lightning struck his tombstone. The cyclical nature of the thing strains credulity, but his tale is well-documented.
The brother of one of the soldiers with whom I served was actually struck three times. Once the poor guy was in the shower. I can only imagine what that might do to somebody’s emotional well-being, not to mention your perspective on general hygiene.
My colleague was from rural Texas. He said that every time it got a little bit stormy out, his brother would retreat to the living room away from the television and read a book. Who can blame him?
Walter Summerford got struck by lightning once after he was already dead. This is his shattered tombstone. Image: Public domain.
Ruminations
As kind of an amateur science guy myself, I always gravitated toward basic physics. I can get my head around the way things move. However, chemistry and electricity always kind of made me itch. I struggled to visualize these disciplines, so they held little fascination for me.
However, I have long appreciated that electricity is best appreciated at a distance. If Walter Summerford has taught me anything, it is that I’d really sooner not get struck by lightning.
From Hiroshima’s first operational strike to the Demon Core’s deadly lessons, this is how nukes, missteps, and raw physics still terrify a very modern world.
Why Nukes Still Keep Putin Relevant
Humanity has a weird love-hate relationship with nuclear weapons. They are at once everywhere and nowhere. The spectre of nuclear war shapes geopolitics unlike anything else. However, nobody really knows what that would look like.
We still don’t really know how a serious nuclear exchange might play out, because we are all too rightfully terrified to try it. Public domain.
The Trump Card
Nukes are the only reason anybody on Planet Earth still takes Vladimir Putin seriously. Russia has a population of around 146 million. Russia’s gross domestic product falls just behind that of Italy and just ahead of that of Canada. Germany’s economy is twice as vibrant as that of the Russian Federation.
Ours is ten times larger. Were it not for the 4,309 operational nuclear warheads that Putin maintains, Russia would be rightfully viewed as a Third World backwater goat-spit of a nation. Absent those nukes, the world would have long ago banded together and spanked the Russians right out of Ukraine. However, nuclear war scares absolutely everybody, and for good reason.
Here we see Russian President Vladimir Putin (right) meeting with Barack Obama. Putin is an objectively horrible person. Public domain.
Nuclear weapons have only been used twice in real combat, and that was back in 1945. Both of those bombs were essentially prototypes.
North Korea conducted the world’s last live nuclear test in 2017. Imagine how much the world has changed since 1945. Back then, telephones were the size of shoeboxes and were tethered to the wall.
Now they are smaller than a box of wooden matches, ride in your pocket, and will let you talk to people in Norway from a subway in Istanbul. Nuclear weapons evolved just as transformationally; it is simply that nobody tries them out anymore.
Hiroshima: The First Operational Atomic Strike
On 6 November 1945, we dropped the world’s first operational nuclear weapon on Hiroshima, Japan. The Hiroshima bomb was a gun-type design powered by uranium-235. In this case, a slug of uranium was fired along a short barrel to impact a target made from the same stuff.
This is a photograph of the world’s first operational atomic bomb as it was about to be loaded into the B-29 Enola Gay for the attack on Hiroshima. Public domain.
This violent kinetic reaction created a critical mass that resulted in a nuclear detonation. The Hiroshima bomb had a nominal yield equivalent to around 15,000 tons of conventional TNT explosive. It killed 70,000 people at the time of detonation and claimed about the same number later from residual effects.
Nagasaki: When Smoke Saved Kokura
Three days later, we deployed a second nuclear device over Nagasaki. Curiously, Nagasaki was not the primary target. The second atomic bomb strike was to be directed at Kokura, but thick smoke over the target spared that city. The aircraft commander, a 25-year-old Army Air Corps pilot named Charles Sweeney, made the call on the fly to switch targets to Nagasaki.
Charles Sweeney is the guy in the dark jacket. He was only 25 years old when he commanded a mission to obliterate an entire Japanese city. That’s what it took to win the war. Public domain.
This second bomb was an altogether different design that was markedly more complicated than the first. This weapon was powered by plutonium-239. Plutonium-239 does not occur in nature.
This isotope is a byproduct of the reaction that occurs when uranium-238 captures a loose neutron inside a nuclear reactor. Plutonium-239 is more easily produced than uranium-235. However, it is tougher to get plutonium-239 to go off uniformly.
The second bomb used an altogether different mechanism. A series of chemical explosive charges configured similarly to the individual components of a soccer ball were arrayed circumferentially around a plutonium core.
When carefully detonated at exactly the same moment, this created an immense imploding pressure wave that drove the plutonium to critical mass and resulted in a nuclear detonation. This nuclear strike killed 74,000 people at the moment of detonation and claimed a further 70,000 souls by the end of the year.
Manhattan Project Money, Pressure, and Mistakes
The Manhattan Project was the program that created these two weapons. It cost $2 billion in 1945. That would be about $30 billion today.
The Manhattan Project was the second-most expensive military undertaking of World War 2. Curiously, the most expensive was the production of the B-29 Superfortress bomber that delivered the weapons. The overall cost of the B-29 program was closer to $3 billion.
The development of the B-29 Superfortress bomber was actually the single most expensive engineering enterprise of World War 2. Public domain.
Nuclear research in 1944 and 1945 was moving at light speed. We desperately needed the A-bomb as a tool to end the war. We knew that every other major combatant nation on Planet Earth was rabid for this capability. Whoever first deployed nuclear weapons at scale would undoubtedly emerge victorious. That pressure to produce resulted in some tidy little tragedies.
How Atomic Energy Gets So Big From So Little
Nuclear energy is just crazy weird if you think about it. The laws of conservation of mass and energy posit that matter and energy can neither be created nor destroyed; they just change forms. When you strike a match, the fuel in the match doesn’t actually cease to exist. It just changes into hot gases, smoke, ash, and the like. Those laws no longer apply when it comes to nuclear reactions.
The Hiroshima bomb is on the left. The Nagasaki weapon is on the right. Public domain.
When the first bomb detonated over Hiroshima, about 0.7 grams’ worth of uranium—roughly the same weight as a small paperclip—was instantly transformed into pure energy. That uranium no longer existed within the physical universe.
It had actually been turned into energy in accordance with Einstein’s E=MC2. If my math is correct, that paperclip’s worth of uranium released as much energy as two million conventional 155mm high-explosive artillery rounds all going off at one time. Wow…
The Demon Core: A Softball-Sized Killer
The thing about radioactive material is that you really don’t want to get any of it on you. The half-life for plutonium-239 is 24,110 years. That means it takes 24,110 years for half of a quantity of radioactive plutonium-239 to degrade into something less lethal. That stuff is unimaginably dangerous.
Harry Daghlian is second from the left. Louis Slotin is second from the right. Here, the two men are helping assemble a nuclear bomb. Both physicists died horribly after being accidentally exposed to vast quantities of radiation. Public domain.
Back in 1945, we had little clue what we were doing. The eggheads who made it called this particular sphere of plutonium gallium alloy Rufus. Rufus was 8.9 cm in diameter. That’s roughly 3.5 inches. For the sake of comparison, a regulation softball is 3.8 inches across.
Plutonium is really dense. This softball-sized chunk weighed 14 pounds. As plutonium corrodes readily in the presence of oxygen, this sphere was coated with nickel to help retain its stability. Rufus eventually became known as the Demon Core.
We built this monster to power the third atomic bomb that was obviously never dropped on Japan. When Japan capitulated, the core was retained at the Los Alamos Laboratory in New Mexico for research. One of the questions that needed to be answered was exactly how close this thing was to criticality just sitting on a table.
Daghlian’s Accident: A Brick, A Spark, A Fatal Dose
Plutonium naturally releases neutrons. Focusing these neutrons back into the material is what causes the mass to go supercritical and explode. How much of that neutron flux was required to get the party started was important to know.
On 21 August 1945, a 24-year-old physicist named Haroutune “Harry” Krikor Daghlian was studying just that. To do so, he stacked tungsten carbide bricks circumferentially around the magic ball. Tungsten carbide is an effective neutron reflector. While he was occupied doing this, a 29-year-old military security guard named Robert Hemmerly sat at a desk some dozen feet away.
This was the situation that led to the death of Harry Daghlian. Daghlian inadvertently dropped one of the tungsten carbide blocks shown here and created a catastrophic radiation release. Los Alamos photograph.
As Daghlian carefully stacked these heavy bricks around the core, he accidentally let one slip out of his hands. This thing bounced off the plutonium sphere, creating an impressive shower of sparks.
He immediately moved the offending brick back to its intended spot. 25 days later, Harry Daghlian died of acute radiation syndrome. Private Hemmerly succumbed to acute myelogenous leukemia in 1978, 33 years after the accident. Hemmerly was 62 at the time.
Tickling the Dragon’s Tail: Slotin’s Fatal Slip
On 21 May 1946, a physicist named Louis Slotin was tending to Rufus alongside seven assistants. They were, likewise, studying the effects of neutron reflectors on critical mass. Slotin was actually scheduled to leave Los Alamos. He was only present to demonstrate the technique to Alvin Graves, another physicist who was planning to use this core during Operation Crossroads, the nuclear tests at the Bikini Atoll.
The beryllium spheres shown here acted as neutron reflectors to energize the plutonium fuel. Note the lack of gloves. Additionally, somebody was obviously drinking a Coke around this stuff. Public domain.
In this case, the reflectors were a matching pair of machined beryllium spheres. The astute film nerd will recall the comic reference to beryllium spheres in the epic sci-fi farce Galaxy Quest. Galaxy Quest is one of my favorite movies. If you haven’t seen it, check it out. You’ll thank me later.
Galaxy Quest is nature’s perfect movie. There is an oblique reference in the film to early nuclear research.
Anyway, the protocol required that these spheres be arranged around the plutonium core using shims to maintain a slight separation so the mass did not become critical. However, Louis Slotin was a rebel. Arcane workplace safety rules didn’t apply to him.
Slotin had done this many times with several different cores, often while dressed in blue jeans and cowboy boots. His technique was to wedge a flat-tip screwdriver in between the beryllium spheres and twist as needed to adjust the spacing. When the esteemed nuclear physicist Enrico Fermi heard about this, he predicted that Slotin would be dead within a year. A colleague named Richard Feynman referred to this unorthodox technique as “Tickling the dragon’s tail.”
One quick slip with a screwdriver was all it took to kill Louis Slotin. Public domain.
As he lowered the top sphere, Slotin’s screwdriver slipped. The two spheres were in contact for less than a second before Slotin flipped the top half onto the floor. Slotin was crouching over the apparatus at the time, so his body shielded most of the rest of his team from the explosive neutron burst.
The relative locations of the people around the core determined their radiation dose. Public domain.
Slotin was 35 at the time. He died of acute radiation poisoning nine days later. Of the remaining six people present, Marion Cieslicki succumbed to acute myelocytic leukemia 19 years after the accident in 1965. Surprisingly, the rest all died of fairly reasonable causes.
Investigators created this map showing where everyone in the room was standing when the accident occurred. Public domain.
What A Real Nuclear Exchange Might Mean Today
The Hiroshima bomb had a nominal output of 15,000 tons of TNT. The Russian Tsar Bomba, the largest nuclear weapon ever detonated, was 3,000 times more powerful. The W88 warhead that currently rides atop modern American nuclear missiles produces 475 kilotons of explosive force, roughly 32 times that of the Hiroshima bomb.
The Russian Tsar Bomba detonated in 1961 with the explosive force of 50 million tons of TNT. An air burst, the force of the detonation actually reflected off the earth and lifted the fireball farther up into the air. The resulting mushroom cloud rose to a height of 42 miles, and the blast wave circled the globe three times. Fair use.
I read recently that somebody believed that the US would return to its current GDP roughly a decade after a global nuclear exchange. Other really smart folks think a serious nuclear war would end all life on Planet Earth. Personally, I’d just as soon we not answer that question any time soon.
High-tempo Special Operations training can cause brain injuries that accumulate unnoticed. One soldier says that is why he snapped and killed three people.
Sgt. First Class Duke Webb was an active-duty Green Beret with seven deployments and a flawless record when he entered a bowling alley in Rockford, Ill., one night and started shooting people.
No one had done anything to provoke him. He just seemed to snap. He shot a 14-year-old boy in the face by the front door, and a 16-year-old girl in the shoulder when she tried to hide. Then he walked into the snack bar and continued to fire.
By the time the police tackled him that evening in 2020, three people were wounded and three were dead. He has been awaiting trial for first-degree murder ever since.
He has admitted that he pulled the trigger. The question is why.
PTSD is the obvious guess. But there is little in Sergeant Webb’s record to support it. He was only in one real firefight, and no one on his team was hit by enemy fire that day.
The real cause, Sergeant Webb and people close to him say, had nothing to do with combat — but everything to do with his Army service.
Special Operations troops train relentlessly, jumping from planes, firing shoulder-fired rockets and setting off explosives. The years of training exposes them to so many weapons blasts and knocks to the head that it can erode their ability to do the job, or even to function normally. Many end up with significant brain injuries — injuries that are often missed by the Army.
That is what Sergeant Webb says happened to him. After 12 years in uniform, he was having splitting headaches and developed a facial tic. He often lost his train of thought and became so consumed by strange, conspiratorial anxiety that he began insisting that his girlfriend use a code name.
The Army never diagnosed a brain injury, but medical officers grew so concerned that they prescribed for the sergeant a drug used to treat advanced Alzheimer’s disease. He was 37 years old.
When he walked into the bowling alley 16 days later, he told the police afterward, he didn’t understand where he was or what he was doing.
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Duke Webb shot six people at a bowling alley in Rockford, Ill., in 2020, killing three. He has admitted to the shooting but has pleaded not guilty.Credit…Jamie Kelter Davis for The New York Times
His lawyers have argued in court filings that the Alzheimer’s drug, called memantine, pushed his already injured brain past its limits, and that when he opened fire, he was in the grip of psychosis caused by the medication. He has pleaded not guilty.
“I know what I did was wrong, and I deserve to be in here suffering,” Sergeant Webb said in a telephone interview in the fall, in which he sometimes lost his train of thought and rambled. “But the military used me up, then abandoned me,” he said. “I feel left behind.”
Instead of trying to understand whether off-label medication and years of blast exposure had contributed to the killings, the Army quickly cut ties with Sergeant Webb.
Shortly after the bowling alley shooting, it sent a psychologist to assess Sergeant Webb in jail. The military wanted to force him out of the Army, but federal law required it to first determine whether he was medically fit to be discharged, or had a service-related injury that required Army care. The psychologist wrote that Sergeant Webb probably had experienced a “brief psychotic disorder,” and showed signs of PTSD and a brain injury. The Green Beret was not fit to be discharged, he wrote.
The Army discharged him anyway. The paperwork rated his service as “other than honorable,” cutting him off from veterans’ medical care and benefits.
There are now three possible outcomes for Sergeant Webb’s criminal case. A jury could find him guilty and send him to prison for life. It could find him not guilty by reason of insanity, and send him to be confined in a state hospital where he would be treated and perhaps eventually released. Or it could decide that the drug prescribed by the Army temporarily made him insane through no fault of his own, and let him walk free.
In none of those scenarios, though, would the Army learn whether blast exposure in training played a role in what happened, or how that training may be hurting other soldiers.
Sergeant Webb has been in jail for five years, much of it in solitary confinement. In part because of his rattled mental state, he has replaced his legal team several times, delaying his trial and exhausting his savings — about $400,000. He has grown hopeless and at times suicidal.
“I just get tired of living with myself,” Sergeant Webb said. “The people I served with, most of them seem to have forgotten about me. What I did was so horrible, no one wants to take the time to try to understand why it happened.”
Constant Training, Constant Exposure
Sergeant Webb joined the Green Berets in 2010 after two years in the regular Army. He was assigned to 7th Special Forces Group at Eglin Air Force Base in Florida and began a grueling decade of training and deployment.
The Army sent him to explosives school, sniper school, jump school and dive school. He learned to fire mortars and other heavy weapons that can cause brain injuries. He deployed three times to Latin America and four times to Afghanistan. Though combat exposure was minimal, blast exposure was constant.
In Latin America, he taught partner armies how to create landing zones in the forest using explosives. In Afghanistan, he trained local troops to detonate mines, and blew up abandoned American military equipment to keep it out of Taliban hands.
“None of those blasts completely rocked you — they didn’t hurt,” Sergeant Webb said in the interview. “But you could feel them in every part of your body.”
In interviews, Sergeant Webb and several other Green Berets estimated that only 10 to 20 percent of their overall blast exposure had come in combat. The vast majority was from training, not war.
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Sgt. First Class Duke Webb, pictured with colleagues, is one of a number of career troops with blast exposure who developed a pattern of cognitive and other symptoms sometimes called Operator Syndrome. Credit…Jamie Kelter Davis for The New York Times
The brain is an exceptionally delicate network of some 100 trillion neural connections. Blast waves surging through repeatedly can fray its tiny fibers or break them. When damage piles up, the brain’s reactions can become hard to predict.
Early in his career, Sergeant Webb had a reputation in Special Forces for being meticulous, calm and motivated. “He was a go-getter, very smart, well spoken, squared away, never in trouble,” said his former team leader, retired Master Sgt. Duane Flores.
But over time, Sergeant Webb started to unravel. It began with restless sleep and disturbing dreams, then headaches so severe that he worried he might have a brain tumor. His thoughts grew scattered, and he struggled to retain information.
The Army treated the symptoms without diagnosing a larger cause. He got medicine for his headaches, and the stimulant Adderall for concentration.
His girlfriend at the time, Monica Gonzales, watched him gradually grow so fearful and suspicious that he started to refer to her outside the house only by the code name Matilda.
“It got worse over time, to the point that it was really making me nervous,” she said.
‘Driving With the Engine Light On’
Sergeant Webb is an extreme case of a much larger problem in Special Operations that the military is largely blind to.
Years of intense training and exposure to weapons blast waves can cause profound scarring in the brain that makes top-performing soldiers fall apart. But in caseaftercase, the military has missed the onset of these kinds of brain injuries, in part because there is usually no obvious single accident or attack to point to as a cause, and in part because the symptoms can resemble those of PTSD.
In career Special Operations troops, insomnia, anxiety, confusion and other problems are so common that the pattern has been given a name: Operator Syndrome.
Murder and other violent crimes are a rare outcome, but when they occur, the military does little to understand whether brain injuries played a role. If troops are arrested in the civilian world, the military simply discharges them and moves on.
In response to questions from The New York Times, Special Operations Command, which oversees all Green Berets and Navy SEALs, acknowledged that “years of routine training and weapons use, particularly exposure to blast overpressure, can pose risks for brain injuries in career operators.”
A spokeswoman for the command, Col. Allie Weiskopf, said it was changing some training to reduce exposure, and increasing screening for injuries. The changes, she said, exemplify Special Operations Command’s “commitment to supporting the well-being of its personnel throughout their entire careers.”
When blast-exposed troops have turned violent, though, the military has repeatedly dismissed the possible role of cumulative brain injury, in favor of explanations that don’t implicate its training or equipment.
In 2002, four soldiers at Fort Bragg murdered their wives in a six-week span. Three were senior enlisted Special Forces soldiers just back from Afghanistan. The fourth was a combat engineer in a unit that had done extensive explosive disposal work in Kosovo.
An Army investigation initially focused on whether a malaria drug could be at fault, and eventually concluded that pre-existing marital problems were largely to blame. It never considered blast exposure.
In 2023, an Army National Guard staff sergeant who had spent years as a grenade instructor killed 18 people in Maine, and then died by suicide. A civilian laboratory that examined tissue from his brain found damage that it said was consistent with repeated blast exposure. The Army said it saw no connection.
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Brain injuries can accumulate in troops frequently exposed to blast waves in training. A laboratory found signs of such injuries in brain tissue from a Maine gunman who worked as a grenade instructor. Credit…Hilary Swift for The New York Times
Sergeant Webb wasn’t the only member of his Special Forces team who was struggling. His communications sergeant, Aaron Tugmon, started to have crippling panic attacks and insomnia. Reading became a struggle, and remembering nearly impossible. The Army prescribed drugs for sleep, anxiety, depression, and headaches, plus Adderall for concentration.
“Before I knew it, I was on, like, eight pills, and the Army never really looked at the cause,” said Mr. Tugmon, who retired as a chief warrant officer in 2024.
Their former team leader, Sergeant Flores, had many of the same problems, and the Army put him on many of the same drugs. He fought to control his emotions, and one morning, he chased a man who had been tailgating him and got into a physical confrontation.
“It was clear something ain’t right,” he recalled in an interview. “That’s when I went for help.”
He was medically retired from the Army in 2020. Afterward, he worked as a civilian for a Special Operations program that encourages soldiers to seek health care. The job revealed to him how widespread the problems were.
“I would say, 90 percent of our operators are driving with the engine light on, trying to ignore their problems until they can’t anymore,” he said. “Very little of it rises to the level of murder, but there are assaults, suicides, drugs, domestic problems. A lot of people are hurting.”
The problems also show up in career Navy SEALs, said Chris Frueh, a psychology professor at the University of Hawaii who encountered the pattern when working with SEALs transitioning to civilian life. Unsure how to properly categorize what he was seeing, in 2020 he proposed the “Operator Syndrome” designation.
There are probably many contributing causes, including chronic stress, sleep disturbance and exposure to combat, Mr. Frueh said, “but maybe the biggest factor is brain injury.”
‘I Could Feel the Synapses Misfiring’
By his seventh deployment in 2020, Sergeant Webb was a wreck. He was in an intelligence job at a secure base in Afghanistan, working largely at a desk, but his headaches grew so intense that he often had to stop and lie down in a dark room.
“I felt like I could feel the synapses misfiring, like my brain was just scrambled eggs,” he recalled.
When he got home in August 2020, he seemed different in ways that friends found hard to explain. He had always been meticulously neat, but now his house was cluttered with unfinished projects. Commuting to work one morning, he saw a cardboard box on the roadside and was so sure the logo on it was a sign of communist activity that he filed a report with Special Forces.
“He would cry over all sorts of things,” said Ms. Gonzales, who remained friends with him after they separated in 2019. “He was sure people were out to get him.”
In December 2020, the pain and confusion grew so bad that he sought help from a Special Forces psychiatrist. The doctor scheduled him to come back in a month for a brain injury assessment, and prescribed memantine.
The drug is approved to treat late-stage Alzheimer’s, and is sometimes prescribed off-label for other forms of dementia and for headaches. But patients must be monitored carefully, because in rare cases, it can cause serious side effects, including psychotic delusions.
Sergeant Webb never made it to his follow-up appointment.
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Early in his career, Duke Webb was known as a meticulous, squared-away soldier. His mother, Janice Webb, held a portrait of him as she waited in November for a video call with him from jail. Credit…Jamie Kelter Davis for The New York Times
A few days after starting to take memantine, he traveled to Rockford, where his father was in a coma after an auto accident. He stayed with his half brother, Anthony Gonzales, who immediately noticed that something was off. The Green Beret had developed a stutter, blinked hard while speaking and peered constantly out windows.
“I figured it was PTSD or something, and just tried to let him know it was all OK,” Mr. Gonzales said in an interview.
Sergeant Webb stayed in Illinois through Christmas. During that time, he said in an interview, he became convinced that the federal government had been replaced by a shadowy conspiracy of Communists, Russian operatives and violent street gangs, and that ordinary people he encountered — hospital workers, waitresses, delivery drivers — were in on the plot.
On Christmas night, he told the police, he sat awake with a gun, afraid that someone was going to attack.
The day before Sergeant Webb was scheduled to return to Florida, Mr. Gonzales had to go to work at a bowling alley called Don Carter Lanes, where he was the cook and night manager. He asked Sergeant Webb to come along.
At the alley, Mr. Gonzales took his half brother to the snack bar, gave him a menu and told him to pick something out. Mr. Gonzales went to the kitchen to cook. Sergeant Webb quietly scanned the room, his thoughts reeling.
“It was like the most extraordinarily vivid combat dream I’ve ever had, and I felt everyone was trying to kill me,” he said later.
He became so agitated that he vomited in the snack bar, and then went to find his half brother in the kitchen. As he did, he pulled out a concealed handgun.
“I tried to calm him down,” Mr. Gonzales recalled. “I said, ‘You’re surrounded by good people. Ain’t nobody gonna hurt you.’”
Sergeant Webb put his gun away, took a few deep breaths and appeared to relax. He left the kitchen.
A minute later, Mr. Gonzales heard a loud bang, as if someone had dropped a bowling ball. Then several more.
From the kitchen, he saw his brother pointing a gun. “I yelled, ‘Duke, no!’” Mr. Gonzales said. “He snapped his head and looked at me. But you could tell by his look that it wasn’t really him. I saw that look, and I took off running.”
A correction was made on
An earlier version of this article misspelled the surname of a University of Hawaii psychology professor. He is Chris Frueh, not Freuh.