starting with her official boyfriend michael stodnick, who had a date with anna the night she was killedo reported her missing. detectives invited stodnick downtown and grilled him about his whereabouts the night of anna's death. >> and the boyfriend's alibi is, "i was there at the scene of the murder. i just couldn't get in and i didn't know she was there"? >> right, right. well yes. >> he said he was at um grapevine elementary, getting his daughter's grades. meeting with the teacher, and that he didn't make it house until about 7:30 p.m. that night. >> so he was there at the scene of the crime? >> he puts himself at the scene of the skricrime. >> but after the murder happened? >> that's correct. >> reporter: stodnick answered all their questions, but a couple of things left the cops wondering. during the interrogation, he asked if he should get a lawyer. and then later, he did. >> anna's son igor, talks to you freely, doesn't hire an attorney. her ex-husband bob talks to you, doesn't hire an attorney. her boyfriend, however, does. that make you sit up and take notice? >> he does raise