welcome back. nearly three years after gavin smith s disappearance john creech was charged with his murder. police ble believe john carried out the killing as revenge with the affair with his wife khanchan c. one person could give the truth to them directly. so they figured out a way to get it. once again, here s keith morrison. reporter: detectives john o brien had a problem. an important witness who wouldn t talk, chandrika creech had clammed up. but there s more than one way to get a story. they found an associate of john creech s, someone who knew chandy. they convinced him to wear a wire and meet with her. it worked. do you want the whole story? yeah.