PHOENIX -- The Maricopa County Sheriff's Office is investigating the death of an inmate at the Towers Jail early Sunday morning.
A sheriff's officer found Felix Martinez Torres, 47, sitting upright but unresponsive in his cell shortly after midnight, according to MCSO spokesman Deputy Joaquin Enriquez. The officer called for assistance from medical staff.
Nurses and detention officers from the Towers Jail Medical Clinic responded within two minutes, according to Enriquez. CPR was administered until members of the Phoenix Fire Department arrived and took over.
Torres was transported to St. Joseph's Hospital where he later was pronounced dead.
Detectives interviewed Torres' cellmates and family members, who said that he had a history of medical issues.
Enriquez said no suspicious circumstances are suspected. The medical examiner will conduct an autopsy to determine the cause of death.
Torres was booked into the Fourth Avenue Jail on Sept. 30 on warrants stemming from driving on a suspended license and failure to appear in court.