Adam Russell Mancebo, 41, was shot and killed on February 6, 2019, inside a home in Happy Valley, California. The Shasta County Sheriff’s Office responded to a 911 call about a gunshot victim and found Mancebo deceased with a gunshot wound to the torso.

Michael Patrick O’Connell, Mancebo’s roommate of about a year, was at the scene and admitted to shooting him with a 12-gauge shotgun. O’Connell was arrested on suspicion of murder and arraigned in Shasta County Superior Court; he pleaded not guilty and indicated he might claim self-defense, a claim the Deputy District Attorney said they expected to be raised at the preliminary hearing. Family and friends who attended court hearings said they were shocked and confused, noting the two men had known each other for years and previously lived together in Cottonwood.

The argument that led to the shooting has not been publicly clarified. If anyone knew Adam, Michael, or has information about what happened that day, please share tips with the authorities handling the case.