he has just arrived at shotts to begin a six-year sentence for assault and robbery. >> okay, tell me,hat happened to your face? >> one guy got banged in the face, one guy got slashed and the guy that got slashed was me. >> we quickly learned that shotts is full of young men whose lives have been put on hold due to knife violence and for many of them, like 22-year-old adam gallagher, the violence was fueled by a combination of alcohol and drugs. >> i stabbed people, i slashed people, i scolded people. that was the only way for me to survive. >> gallagher came to prison four years ago on a murder charge. he claims he didn't know his girl friend stole a drunken man's wallet. when the man pursued them, gallagher struck. >> he more or less collapsed straight away. and we ran away. we got caught the next day. at the time i wasn't really thinking. and i was on drugs and drunk. >> gallagher received a life sentence but is eligible for parole after 15 years in prison. he works here as a barber. >> my mom and dad were middle class, suburban people, doesn't bother anybody. so for me to come into