reported her missing. detectives invited him downtown and grilled him about his whereabouts the night of anna's death. >> and the boyfriend's aliby was i was there at the scene of the murder, i could not get in and i didn't know she was there. >> right, yes. >> he said that he was at grapevine elementary getting his daughter's grades much. >> he answered all the questions. but a couple of things left the cops wondering. during the interrogation, he asked if he should get a lawyer and later, he did. >> anna's son talks freely to you. 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 the question of if he should get an attorney, about the time we started to ask