detectives started out with a list of four possible suspects, men whom christie had dated, and each one of them was questioned, their movements and alibis checked, and then one by one, they were cleared. but christie's father, bud fleming, remembered something. there had been a young man years earlier when christie was a teenager, but he had forgotten all about the kid, wouldn't have thought of him at all except a few months before christie was murdered. >> he gets a phone call one day. "hi, this is a voice from your past." bud's, like, "well, i don't have time for this. who is this?" he's like "it's me, it's art." >> art? who was art? he was arturo gutierrez, christie's high school sweetheart. >> they had a relationship. in fact, they had a sexual relationship, and apparently she became pregnant and ultimately had an abortion, ultimately they broke up, and there had been a number of years that had passed since he had been in contact with her. >> then there he was out of the blue on the phone with christie's father. >> he said, "i'd like to get ahold of christie. can you give me her number?"