you knew it was your daughter, what went through, you judy? >> i lost a son in 78 in a car wreck. he was gone when i got to the hospital. i could have shed a few tears and went about my business. my son was 21 and he had no children. >> the loss of erin was devastating. now the family had to deal with what happened to baby erica. finding out in the most impersonal way. >> i knew she was hurt, but the police rushing her down the street. >> later they learned she had been shot in the head. >> 'in the name of god would somebody do that? >> it was this man's job to find out. >> how many times have babies been victims. >> never been a case where a baby had been shot. >> a once promising career at the university of louisville,