wireless communication. a way to become someone else. every chance i got, i took. >> after years of taking classes, brook finally found a skill that could make him money. >> this is a certificate from the blackstone career institute as a paralegal and legal assistant. >> brook is a jailhouse lawyer. a position like this can be very lucrative behind bars, but success is based entirely on how many inmates you work with. >> he's pretty good at it. i've known him for about four years. he's pretty sharp. i pick his brain whenever i get the chance. >> this job has cost brook his anonymity on the yard, making it harder to keep his secrets. >> okay, here, i know too many people on this yard. too many people know me. and i'm just not used to that