Serial Killers True Crime Science

David Berridge has spent 28 years working as a prison officer, with 22 years at Parkhurst. A tough character with a big personality and a dark sense of humour, David has had to deal with it all - serial killers and gangsters, terrorists and sex offenders, psychopaths and addicts. Inside Parkhurst is his raw, uncompromising look at what really went on behind the massive walls and menacing gates of one of Britain's highest security prisons.

This suspenseful true story of a drug cartel hitman who got away with murder after murder in California's Central Valley over three decades reveals how the criminal justice system fails our most vulnerable immigrant communities. On the surface, 58-year-old Jose Martinez didn't seem evil or even that remarkable - just a regular neighbor, good with cars and devoted to his family. But in between taking his children to Disneyland and visiting his mom, Martinez was also one of the most skilled professional killers police had ever seen.