kids, they turn over to heroin because it's a lot less money on the street. >> addiction leads inmates to feed their habit in jail. >> not often but on occasion mail will be used to try to bring contraband into the facility. inmates become very ingenious and get relatives to mail them contraband, drugs. >> officer domenico was recently on mail room duty when he came across a suspicious birthday card. the card was turned over to one of the jail's investigators. >> two cards glued together with four decks of heroin taped inside. it was addressed to inmate battaglia. >> the recipient of the card was immediately removed from his single person cell. >> no details with him inside