I think the child might be greatly comforted knowing the monster is dead and will never, ever hurt them again.
Maybe, but probably not. In the child’s mind the pedo isn’t the only perpetrator. By design, we are meant to be protected as children, so a victim, naturally and often, places more blame on the failure of guardianship than on the end abuse. We can come to terms with “the world is filled with bad people”, but it’s harder to swallow “I wasn’t worth protecting.”