Reduce the sentences of 3 young men

Alexandro Trevino , Christian Trevino , & Juan Eduardo are all being tried for multiple charges as of result of beating 42 year old Gabriel Quintanilla & leaving him to die. This incident was the result of a claim being made against Quintanilla, saying he sexually assaulted a minor. This minor was the Trevino brothers' 9 year old sister. All they were doing was trying to get justice from this incident, because this isn't something you do to anyone; especially not a child. I'm sure if this was anyone's child, a similar action would've been done.