A similar thing happened when I was a kid. My older brother got jumped by two brothers. They were all way older than me.

My father went their house and when their father came to the door my father pulled him out and beat the shit out him in his own front yard right in front of the whole family and the neighbors.

When the police arrived they didn't press charges because if they had my dad wanted charges pressed against their sons as well.

Those boys never messed with anyone again that I know of.