this man, her long ago first husband, the father of her two older children, marty larson. >> did she talk about him at all? >> i knew that she had had a previous marriage, but i didn't know anything more beyond that. >> marty had been out of susie's life for nearly a decade. nothing. but then in 2007, mariah, curious about her biological father, found him on the internet and reached out. marty came to visit a time or two. at least once, susie took the kids to see him imree hours across the prairie in billings, montana. her parents were among the very few people who knew. they were not happy. >> we got into an argument. i said susie, yo don't want to do this. i said the family isn't going to really go for this, and she said, you mean everybody is going to disown me, so i just backed off. i said i'm not going to lose my daughter over him. and that was the end of it. >> how serious it got, nobody knew really. maybe they were just friendly. maybe it was more than that. marty larson in the database. >> and it popped up. i'd seen criminal trespass. >> not long after the wedding, parently ma

now investigator ulrick typed marty larson in the database. >> and it popped up. long after the wedding, apparently marty drove three hours down the highway from billings to agaglendive and tur up outside the newlywed's house with a shotgun. he was convicted with criminal trespass and was slapped with what lifetime restraining order. no contact with susie or ted ever. >> at that point in time, i had a little red flag go up. >> marty and his given first name was walter was very worried about susie. desperate even as those nighttime hours went by without a word from her. marty lives three hours away in billings, so was that where he was calling from? one sure fire way to they can that out was check the cell phone towers. >>> coming up -- >> oh, susie, where are you? where are you? >> marty has a revelation for police. >> were you thinking that you two would get back together? >> that was the plan. i don't have time to be filling out my address, i need to be buying a dress. that's why i use masterpass. less typing, more dancing. sfx: tango music como te llamas? yo soy