If the sexual assault victim or her parents had come forward at the time, Christina would likely still be alive. Unfortunately, it if often very difficult for victims to come forward because they are met with doubt and hostility.
On this board we've had accusation that she lied, that she is like other bold girls, and generally that everything was and is fine. This despite the fact that we know the questionable character of the suspect and the fact that the accusations don't diminish the crime.
If I start mentioning to neighbors, "I wonder if Tom is a child abuser?" and I get a few others to ask the same question, even though we have no evidence of this, we can do pretty good damage to Tom's reputation.
As far as I see it, making claims about the sexual assault victim accomplishes two things. Damages the reputation of the victim and contributes to the hostility faced by sexual assault victims.