. >> reporter: amanda orr of reuters, and brian rogers, the houston chronicle's legal affairs reporterovered the melgar murder. >> they're getting information right away about kind of a sketchy neighbor, known to break into houses, steal stuff and pawn it. and he's up the block and maybe at the scene that night. >> that's right. a neighbor who had -- just getting out of jail, who was suspicious. >> reporter: lizz thought to add him to the list of potential suspects. >> did you have ideas for them? >> i did. >> reporter: she also suggested they talk to one of her parents' tenants, someone who'd had disputes with her dad. and there was a co-worker of jaime's she got a bad vibe from. and again, lizz says she urged detectives to look at her ex. he had a record of drug arrests. if not him, what about people in his circle? months dragged by without word on the investigation. >> you believe someone is out there, has gotten away with culling your father? >> yeah, absolutely. it was hard to sleep at night. i was -- every little noise was -- had me on edge. >> were you worried about your mother?