Could you have grassed up your own father?
I know Rawlins was the killer, but if I found out now that my father had killed a woman 23 years ago, I don't think I would have given him up to the police like Rawlins' daughter did. OK, I might not have wanted to ever see him again, but I wouldn't have told the police.
At the end of the day, I would have already have an established relationship with my father, regardless of not knowing what he did in his past. That would have restrained me from telling the police, regardless of how disgusted I would have been.
Rawlin' daughter is a successful lawyer and no doubt her education was funded in no small part by her father. They also seemed to have a good relationship up to the accusation. So I'm surprised that counted for nothing and she told the police about him so soon.