Is There a Killer?

Kyle's mom told police that her two teenage sons had invited friends over for a sleepover the night before and after everyone went to bed, she awoke to the sounds of someone moaning in pain. She was covered in blood bleeding profusely and explained to her neighbor that a knife-wielding killer had attacked her and her son. The reason dispatch asks all these questions is of course for the safety of the officers arriving at the scene. I mean, the hell with the person that's bleeding on the ground. Cops don't want to get hurt.