patrick.net

Vicente says

Two boys were spending the night together and showed up at their friend's house about 2:30 a.m. Sunday, according to a statement by Billings Police Chief Rich St. John released Monday. The two knocked on their friend's window and threw pebbles in an attempt to wake him, St. John said.

This is a tragedy, not murder.
It could be argued as an example of where the gun killed, not the shooter.
The lives of the shooter and the deceased, along with their families have been destroyed. I feel sorry for all of them. :(

Strategist says

This is a tragedy, not murder.

I don't follow you. Tragedy? KID STOOD HIS GROUND!

Don't want a bullet in the brainpan? Don't go wandering around in nice neighborhoods with your hoodie, or tossing pebbles at a window, or stumble onto a porch and start banging on the door. Too many ways to list, that you can acquire new ventilation.