>> this was made by an aryan brotherhood member in the security housing unit. this was destined for an officer. you can see how he hone it had down on concrete. i mean this is incredible. >> the squad is also responsible for screening any suspicious mail entering the institution. >> there's approximately 5,000 pieces of mail that come and out of our mailroom daily. that's not counting the newspapers and the magazines. the trafficker that prepared this particular envelope, they knew that all the mail that comes into the mailroom is opened by a machine. they cut the top. what this person did this they took small doses of black tar heroin and put it along the glue fold of the envelope and simply sealed it with a greeting card. >> jim dejenet is a member of the squad and he has witnessed smuggling attempts, some nearly impossible to detect. >> okay. we will take that with us. >> the traffickers on the street, they took