Frank Lee Morris and two brothers, Clarence and John Anglin, all convicted of bank robbery, escaped on 12 June 1962 from the notorious Alcatraz island prison in San Francisco Bay renowned for its high level of security.

The acting warden said they put dummy heads - made of a mixture of soap, toilet paper and real hair - in their beds to fool prison officers making night-time inspections.

Photo: CSU Archives / Everett Collection / Rex Features