. >> roca moreno is known to be part of the puerto rican prison gang called the niota's.fficers knight and demerey would like to find evidence of how active he is or if he has any other affiliations. >> what i'm looking for is to see if the mattress has been altered. inmates are notorious for cutting holes anywhere along the seam or the sides, stuffing it with contraband. then they sew their contraband back up in their mattress. >> here we have a spot. that just shows you right there. let's take this one out. this came off the bottom, right? >> right. >> most likely, it's going to be batteries. in this case, it's going to be a cigarette lighter, which is an indication we are probably going to find some tobacco in this guy's room. >> having a lighter is already a rule violation. but with roca-moreno's past history, it could have even more serious consequences. coming up -- >> it's going to be one of them? >> one of what? >> i ask questions, you don't answer? >> no. >> staff interrogate alfredo roca moreno and bobby sandier, and they take their search for contraband to the