Mark Christopher Garity, 29, was found dead in a midtown Tucson street in the early morning hours of February 27, 2018. Officers arriving on scene discovered him with significant head trauma; paramedics pronounced him deceased and an autopsy later determined the cause of death was a gunshot wound. Garity was described by his family as a kind, giving software engineer who loved the outdoors.

Detectives learned Garity had been seen earlier that morning riding with his girlfriend’s brother, 21-year-old Vincent Detwiler, and another male friend of Detwiler’s, both visitors from California. Investigators believed the two men left Tucson and returned to California; after San Bernardino officers located Detwiler he admitted to a role in Garity’s death and was arrested on a count of second-degree murder and booked in San Bernardino County Jail pending extradition. The other man who was with Detwiler and Garity that night has been identified but had not been arrested as the investigation continued.

Did anyone in Tucson or San Bernardino know Mark, Detwiler, or the other man who was with them that night and has information to share?