Mark DeFriest: The Imprisoned Savant

Mark DeFriest, believed to be an autistic savant, was sentenced to four years in prison for 'stealing' tools left to him in his father's will in 1979. Due to his ability to memorize and reproduce jailers' keys simply by looking at them, Mark DeFriest was cumulatively imprisoned for 34 years, with 27 of those years spent in solitary confinement as a result of multiple escapes.