That's playing it very cool... I couldn't do it. Any "body" - I'd be screaming in horror at first, then calm down somewhat to call emergency and LE.
If it were my child's body, I'd be hugging him or her, wishing them back to life with all my being, while I would cry and scream like a banshee. Not for help, for there is none. But for pain. Then I would take them in my arms, cuddle them and call emergency, LE, and swear in my heart that whoever did it had better say their last prayers.
I am a pacifist, but when it comes to children being hurt, let alone killed, that's the limit. I wouldn't hurt the perp myself, but I would see that they get the maximum penalty allowed. I'm against the DP, but in such a scenario, I would feel almost comfortable that it would be justified.
JMHO