Daniel Leroy “Hoover” Seybert was a 46-year-old White/Caucasian man and a prominent figure in Arizona’s motorcycle-club world. He lived in the Phoenix area and was identified in contemporary reporting and his obituary as the president or a leading member of the Hells Angels’ Cave Creek chapter. He had been born in Detroit, Michigan, and was remembered by those close to him as a brother, father, son, uncle and friend.
By 2003, Seybert was closely associated with the Cave Creek Hells Angels and was well known within the local biker community.
In the early morning hours of March 22, 2003, Seybert was at Bridget’s Last Laugh Bar, located at 17222 North Cave Creek Road in Phoenix. At approximately 1:10 a.m., he was killed in the bar’s parking lot. Available accounts describe the killing as a shooting, with later published descriptions of the autopsy stating that Seybert was shot in the head at close range with a small-caliber firearm. His death immediately stood out because of his position within the Hells Angels and because tensions involving rival motorcycle clubs were already high in Arizona and elsewhere in the West.
The timing of the murder contributed to speculation about whether it was connected to the broader conflict between the Hells Angels and the Mongols Motorcycle Club. The two clubs had been involved in serious violence, including the deadly confrontation at the Laughlin River Run in Nevada in April 2002. Just two days after Seybert was killed, a Mongols member was stabbed in the back at a Reno, Nevada, gas station, and contemporary reporting said a Hells Angels member was suspected in that attack. Authorities, however, said they did not know whether the Reno stabbing was connected to Seybert’s murder.
Other theories developed because Seybert’s death occurred while federal authorities were conducting an extensive undercover investigation of the Arizona Hells Angels known as Operation Black Biscuit. Undercover ATF agents had been attempting to infiltrate the organization, and accounts of the operation describe internal friction within the Arizona chapters as well as deep suspicion of outsiders. Some later narratives suggested that Seybert could have been killed as part of an internal motorcycle-club dispute, while others speculated about retaliation from a rival club. Allegations involving federal agents also circulated afterward, including accusations by Hells Angels figure Sonny Barger, but no reliable public evidence established that law enforcement was responsible for Seybert’s death. Those claims remained accusations and theories rather than findings in a criminal case.
Despite the circumstances surrounding the killing and the intense law-enforcement attention directed at the Hells Angels during that period, no publicly identified suspect has been charged with Seybert’s murder. Phoenix-area Silent Witness materials continue to identify the suspect simply as unknown. The homicide has remained unsolved, and available public records do not show an arrest, prosecution, trial or conviction for killing Seybert.
Federal and local authorities did make numerous arrests of Hells Angels members and associates later in 2003 as investigations into the organization intensified, including arrests arising from racketeering, weapons and other alleged crimes. Those cases were connected to broader investigations and motorcycle-club violence, not to a proven prosecution of Seybert’s killer. Nothing in the available reporting establishes that any of those arrested individuals was formally charged with his homicide.
Seybert’s killing therefore remains a cold case marked by a public setting, a close-range shooting and several possible motives but no officially named murderer. His role as a Cave Creek Hells Angels leader placed the homicide against a backdrop of rivalry, federal infiltration and internal tensions, yet investigators never publicly developed that background into a prosecutable case against a specific person. More than two decades after the shooting outside Bridget’s Last Laugh, the central question of who killed Daniel “Hoover” Seybert remains unanswered.
