PHOENIX (AZFamily) — A Maricopa County Sheriff’s Office K-9 detention dog died this month after its handler found it in distress at Estrella Jail, according to a statement released by the agency. The sheriff’s office has declined to provide details about how the dog died, calling the matter an active investigation. What MCSO has said According to a statement from the sheriff’s office, around 7:15 p.m. on June 18, a K-9 detention deputy at Estrella Jail found their K-9 in distress.