the other back. sometimes the call is ignored. sometimes chris' phone is blocked. >> reporter: what do you think is going on? >> it looks like a fight. it looks like they're yelling at each other and hanging up on each other. >> reporter: then, while going chris had no criminal record and no eyewitness put him at the scene. and there was still the mysterious l.j., annie's reported boyfriend whom police could never find. not in any police database, not anywhere. that is, until jaclyn knocked on one more door. [ knocking ] >> hey. >> how's it going? >> hi. are you jack? >> yeah. >> i'm detective moore. this is detective johnson. >> reporter: her close buddy and predecessor, derek johnson, was by her side when she went to interview annie's friend jackson. he told them the same story that they'd been hearing all along, annie telling friends she was pregnant. nothing new. but then they asked jackson if he new who l.j. was. his answer floored them. >> she would always referred to