I heard about this on the news.
It's hard for me to imagine someone drowning a kid like that.
I don't know the details of the incident, so cannot comment about what I "would have" done.
Something tells me that I'd be more prone to picking up a big stick and whacking his head with it FIRST.
Then, if that didn't stop him... escalation to whatever was necessary.
But again, the urgency of the moment may not have allowed the stick solution.
I would have stopped it, one way or the other. That much is certain.
Stand Tall, Speak Truth, Never Surrender