If you as a parent went looking for your girls and asked a man who at the time appeared to be just a passerby if he had seen them...and now two years later things have come together to the point where it is believed the passerby was actually the person guilty of killing the girls, would you not be upset? I would be wiped out by something like this. I would need at least two weeks to even partially recover, and probably a whole lot longer than that.
If Abby's dad actually spoke to the killer immediately following the murders, can you imagine what he is going through right now? I tell you, they would have to sedate me in a situation like that.
Now, I am not saying that is what occurred but when you really think about it, it is not out of the realm of possibility.