A 60-year-old inmate has died at Sheriff Joe Arpaio's Tent City, in Phoenix, Arizona.
Officers found Arthur Madril unresponsive in his bunk, at the Maricopa County jail, on Saturday.
Madril was in custody on a $4,000 child support warrant and had been booked into custody in September. He was on work release status, being able to work during the week and report to jail on nights and weekends.
The prisoner had returned to jail Friday night and was found unresponsive by detention officers in the morning. CPR was performed but a Phoenix Fire crew, pronounced him deceased.
Preliminary reports indicate death due to cardiac arrest. An investigation has been launched into his death and Maricopa County Sheriff's officials are waiting on the final report from the Medical Examiner.
Arpaio has been harshly criticized for establishing a "Tent City" as an extension of the Maricopa County Jail, which the sheriff himself, has described as a concentration camp. Within other, activists accuse Arpaio of providing inhumane conditions, in particular for incarcerating men and woman in canvas tents, despite Arizona's extreme weather.