Parent's behaving badly

This article really disturbed me. Then it made me really think. How did this situation end so tragically. Were there steps that could've and should've been taken to avoid this? Of course. But, what are they??????

Here's the article. I would love to hear your feedback on this: Parent's Behaving Badly

Fifth-grade feud leads to death of boy's father

The father of one of the students was killed in the parking lot over problems between their fifth-grade sons having an on-going feud.

The families feuded over alleged bullying between the boys since last year.

Questions:
What would you do if your child was being bullied at school?

What would you do if your child was being a bully at school?