Ohio’s prison system is reviewing how Cleveland kidnapper Ariel Castro - perhaps the most notorious figure behind bars in the state – managed to hang himself with a bedsheet while in protective custody.

Neighbours have said they called police on at least two occasions to check on the peeling, rundown Ohio house where three women, who vanished separately about a decade ago, were being held.

The woman’s voice was frantic and breathless, and she was choking back tears. “Help me. I’m Amanda Berry,” she told a 911 dispatcher.