give me a couple minutes to get back here. >> sergeant nicholas heads the special response team that will attempt to retrieve the key. but to prevent the inmate from swallowing it, they must catch him by surprise. >> let's go to the water well. what water well is, it's basically a plumber's access, you know, the toilets are mounted against the wall, the sink's mounted against the wall. we don't necessarily go in the cell to fix these. we just go to the back water well, full of plumbing. since we have the water well built, they decided, let's put windows. we go on a security walk, the inmates see us and know we were there. we can go in the water wells, turn off all the lights, and peer in those back windows. if the windows aren't covered with obstacles, deodorant, paper, towels, they think these security windows are a shelf for them to put their junk, when they're not. they're for us. >> sergeant nicholas makes his way through the darkened water well to cell six in order to check on the inmate suspected of having the homemade cuff key.