Was it the toddler in the kitchen with the dinner fork?
…or…
The toddler in the boys’ bedroom with the wooden sword?
…or…
The toddler in the girls’ bedroom with the toy train?
…or…
All of the above?
Because when bodies are dropping like flies around here, it is pretty obvious whodunnit.
The only things left to ascertain are when and where he will strike again…and who will be his next victim?
The older kids have their orders. If you see Petey with something in his hand: Run!
Reit This Way 
I think you need to limit that child to handheld objects made of foam rubber!
He is such a cutie! I loved seeing the way he likes to make your other children laugh. Let us know if he grows up with his comedic gift in tow!