still, the los angeles county jail system is enormous. it's run by more than 13,000 employees and is the largest sheriff's department in the world. it houses more than 20,000 inmates in eight different facilities, all waiting for trials, transfers, or release. let's go inside l.a. county jail's supermax facility that holds the city's most violent inmates. we'll show you how the jail detectives solve crimes committed behind bars and how violent inmates are learning to rehabilitate themselves. but first we travel 40 miles north of downtown los angeles as we continue our look behind the walls of l.a. county jail. nestled in the high desert mountains and a 40-mile bus ride north of downtown los angeles is the peter j. pitchess detention center. named after a former sheriff,