. >> reporter: prosecutors close their case with a star witness, jones ex-wife, lisa nance. >> he saidi'm going to kill you and he just slapped me repeatedly. i could taste blood. i grabbed his hand and asked him to stop. >> reporter: nance says in the late '90s, when their marriage was ending, jones kidnapped her at gunpoint and threatened to kill her. >> he said he was going to put me in the bottom of the lake where no one would find me. >> reporter: she escaped, and jones served five years in prison. but then lester jones' defense attorneys get their turn. they argue jones is the wrong man and proceed to present a parade of alternate suspects. there's john livingston. >> i did call some services back then and dumb, but i did. >> reporter: a ranch hand waiting for paige at motel 6 the night she disappeared. >> this is john at motel 6, room 237. i was just checking to see if you had somebody coming out or not. >> you called a company models, inc. that day? >> right. >> reporter: he says she never showed up. >> do you have anything to do with disappearance of paige birgfeld? >> no. >>