Scientist Pete Kelsey and his team have 3D-mapped the entire island of Alcatraz, discovering Civil War secrets, prisoner ...

Steele, originally from Great Bentley, had been an inmate at HMP Whitemoor in 2010 when, whilst inside, the BBC reported he was beaten with a metal pot in a row over the use of a telephone.

On arrival, the team stayed on the island for three weeks — sleeping in cells in the notorious D-block where, historically, some of Alcatraz’s most dangerous inmates have been held.