Born in Detroit, he lived in the Phoenix area and was remembered by family and friends as a brother, father, son, uncle and friend.

In the early morning hours of March 22, 2003, Seybert was at Bridget’s Last Laugh Bar at 17222 North Cave Creek Road in Phoenix. At approximately 1:10 a.m. he was killed in the bar’s parking lot; accounts describe a shooting, and later autopsy reports state he was shot in the head at close range with a small-caliber firearm. The killing occurred amid high tensions between the Hells Angels and rival clubs and while federal agents were running Operation Black Biscuit, an undercover probe of Arizona Hells Angels chapters.

The timing prompted speculation about retaliation by a rival club, internal club dispute, or involvement tied to the undercover investigation, and accusations circulated afterward; no reliable public evidence has established law enforcement responsibility and those claims remained unproven. No publicly identified suspect has been charged in Seybert’s murder, and Phoenix-area Silent Witness materials list the suspect as unknown. The homicide remains unsolved — who knew Daniel Hoover Seybert or has information about that night?