Dr Zimbardo is remembered for an ill-fated 1971 prison study in which he recruited college-aged males to spend two weeks in a mock prison in the basement of a building on the Stanford campus.

The death of a friend in jail by suicide prompted former inmate Kelvin Whitwell to become a counsellor on the outside. Now he's calling for WA's prison system to be reformed.

Tasmania's prison service operated a "hostile management regime" within a high security unit at Risdon Prison, Tasmania's Custodial Inspector has revealed.