Graham De Luis-Conti Dies After Jonathan Watson Beat Two Child-Sex Offenders With a Cane at Corcoran
CORCORAN, CALIFORNIA — Graham De Luis-Conti died in a hospital bed on Sunday, January 19, 2020, three days after another prisoner beat his head with a walking cane inside a dormitory at the California Substance Abuse Treatment Facility and State Prison. He was 62. The man who swung the cane, Jonathan Watson, was already serving a life sentence for murder. The man who died on the way to the same hospital, David Bobb, 48, had been struck in the same burst of violence on Thursday, January 16. Both victims were serving life terms for aggravated sexual assault of a child under 14. Corrections officials named Watson within days. What they did not do, on any public record The AEGIS Alliance has been able to find since, is produce a separate murder conviction that closed the case.
The Associated Press, reporting the second death on January 22, said Watson, then 41, used the cane on both men and left both with head wounds. Bobb died en route. De Luis-Conti was pronounced dead at a hospital on Sunday. Spokeswoman Terri Hardy said the California Department of Corrections and Rehabilitation was still looking at a motive. The prison, in the small Central Valley city of Corcoran, held more than 5,400 people and was built around substance-abuse treatment, not around the idea that a man convicted of murder would be dropped into a dorm with men convicted of sex crimes against children. KTLA carried the same official account. The AEGIS Alliance had already reported Bobb’s death while De Luis-Conti was still alive. His death turned one killing into two.
Watson was not a longtime resident of that dorm. He had pleaded guilty in 2009 to the murder of Garrett Benson in Cutten, a Humboldt County case in which he was also convicted of discharging a firearm causing great bodily injury or death. The sentence was 50 years to life. Days before the Corcoran beatings, he wrote later, his custody level was cut from Level III to Level II. That single bureaucratic step pulled him out of a cell and into a lower-security pod. He called the move careless and said he left a paper trail protesting it. Six days after he arrived, he wrote, a man he identified as a child molester moved into the pod and started putting the dayroom television on PBS Kids in front of the other prisoners.
The Letter That Named Both Dead Men
A month later Watson answered the Bay Area News Group in writing and removed the fog. In the letter, published February 20, 2020, he said he clubbed both men in the head on January 16 with another inmate’s cane. He described going to a counselor about two hours before the attacks and saying the transfer request was urgent, that he needed to be moved before he hurt someone. The counselor, he wrote, scoffed and dismissed him. He went back to the pod. The television was on the children’s channel again. Someone else, he wrote, asked whether that man was really going to watch it in front of them. Watson’s reply, in his own words, was “I got this.” Then: “And I picked up the cane and went to work on him.”
When no guard came through the door, Watson wrote that he went looking for one so he could turn himself in. On the way he came upon a second man he called a known child trafficker. “I figured I’d just do everybody a favor,” he wrote. “In for a penny, in for a pound.” He told a guard what he had done. The guard, he said, did not believe him until he looked around the corner. Bobb was dead within about an hour and a half. De Luis-Conti lived three more days. Watson said he was ready to plead guilty. Kings County, which has jurisdiction over crimes inside the Corcoran prisons, did not rush a public charging announcement into the record. News accounts in February 2020 said no new murder case had been filed. A search of reporting since then still does not show a jury verdict or a guilty plea that added these two deaths as a separate conviction on top of the Humboldt County life term.
That gap matters more than the shock of the letter. A man serving life for murder described, in detail, how he killed two other men, said he had warned staff, and said he would admit it. The state’s answer was an internal review, not a courtroom the public could watch. On October 29, 2020, the Mercury News reported that a review inside the Substance Abuse Treatment Facility found “insufficient evidence” to sustain an allegation that the counselor acted improperly. A report from the California Office of the Inspector General backed that conclusion and gave the department a “satisfactory” mark for how it investigated its own employee. The inspector general’s timeline put the warning about an hour before the attacks. Watson’s letter said something closer to two hours. Either way, the staffer who heard a lifer say he was about to become violent was cleared. No California Department of Corrections and Rehabilitation employee was publicly disciplined over the housing decision or the ignored warning.
A Pattern the Numbers Already Showed
None of this was a surprise to anyone who had read the state’s own death ledger. In a 2015 investigation, the Associated Press catalogued 78 California prison homicides reported since 2007, the year officials began releasing the names and crimes of slain inmates. Male sex offenders were about 15 percent of the prison population and nearly 30 percent of the homicide victims — 23 of those 78 dead. The state had already built special housing to protect people marked for their crimes. The killings continued. California prisoners were being killed at roughly double the national rate in the years the AP measured, about 8 per 100,000 from 2001 to 2012, and a federal receiver later put the 2012–2013 rate at 15 per 100,000. The cane in a Corcoran dayroom sits on that graph. It is not an anomaly. It is what the numbers predicted when a murder convict was reclassified into a dorm with men convicted of sexual assault of children.
Watson did not disappear into that file. On November 3, 2025, a nearly 40-minute phone interview was posted from Kern Valley State Prison in Delano, where he said he was being held. He walked through the cane again. He said the weapon was metal and had been left in the cold until whatever was inside it set up hard. He said he told staff immediately that he had just beaten two child molesters and that one of them was dead. He talked about asking the governor for a pardon on the grounds that Kings County had not brought him to trial under the speedy-trial rules in Penal Code sections 1381 and 1382. And he said, without hedging, that he had “zero doubt” the same housing decisions would produce more killings, and that he could be the person who did the next one if a committee ever put him back in a pod with men convicted of sex crimes against children.
That interview is the part of the story the January 2020 press release could not contain. The department moved him. It cleared its counselor. It left him in the system on the original 50-to-life term. He is still describing the killings as a decision he would repeat. The two men he killed do not get a second version. Bobb died on a gurney. De Luis-Conti died on a Sunday. Both had been convicted of aggravated sexual assault of a child under 14, crimes that made them targets the moment other prisoners knew the case numbers. The law that sent them to prison did not include a clause handing their deaths to a cellmate with a cane. The department that housed them had already been told, by its own homicide data, who tends to die when the wrong people share a dayroom.
The AEGIS Alliance has tracked that targeting for years, in California and outside it. A prisoner choked a child molester to death in another California case. In Britain, men convicted of child sex crimes have been stabbed to death in custody, including Lostprophets singer Ian Watkins. The networks those convictions come out of are a separate file: Hiding in Plain Sight and the dismantling of an 87,000-member network that American television barely touched. None of that reporting is a brief for murder behind a locked door. It is a record of what the state does, and does not do, after it has the power to separate people and chooses not to.
De Luis-Conti’s death is the second name on a single afternoon. The first name was already public when he was still on a ventilator. The third name, Watson, has spent the years since explaining himself from a different prison and daring the classification committee to test him again. The counselor was cleared. The cane was evidence. The dorm was a policy. Readers who want the first death, before the second man died, can start with the earlier report on David Bobb. The wider record of these cases sits in crime news from The AEGIS Alliance.
