The emotion is normal and understandable. As I've said, he's heard them die. He heard their last moments. He saw their bodies. He's met many times with their loved ones and stared into their eyes.
I remember how emotional Chief Tim Longo was during the Hannah Graham case.
This becomes personal to them.
Odd? They're kids. I don't care about their size. That's irrelevant.
Many females in general don't fight back. For various reasons. And these were kids. Kids taught to obey authority as most kids are.
It would be relatively easy to control, assault and kill kids this age without detection, IMO.
From a site about sexual assault about "fighting back":
If a victim does not say "no" or does not "fight back," it is not sexual assault.
False.
Sexual assault victims may not say "no" or not fight back for a variety of reasons including fear and confusion. Rape victims often report being "frozen" by fear during the assault, making them unable to fight back (this is known as “tonic immobility”); other victims may not actively resist for fear of angering the assailant and causing him to use more force in the assault. Pressure to be liked and not be talked about negatively by a peer will sometimes cause adolescents or children to avoid fighting back or actively resisting.
California Megans Law
BBM.