‘Devastating’: troubled federal correctional center failed to prevent death of man in medical crisis

Exclusive: In the third of a three-part special report, disturbing video highlights the death in Cibola of a young man suffering from mental illness

• Part 1: FBI investigates drug-trafficking epidemic' in prison also housing Ice detainees: A lot of corruption'

• Part 2: A death sentence': a young mother grappling with addiction dies in a drug-plagued US prison

Private contractors at a federal detention facility delayed calling for an ambulance for hours during a man's health crisis the day before he died, video and records obtained by the Guardian can reveal.

Correctional staff pinned the bloody and bruised man to the floor in a medical observation cell for nearly four hours.