K.B.
Sounds like you are getting mismatched stories from too many different outlets, you need to all be on the same page. If the teachers are truly seeing different scenarios than the ones reported by the VP, I would suggest scheduling a meeting with those teachers, the VP, and the principal. Not to necessarily report the VP, but as an exploration to understand the events better and to get suggestions on the future. Sort of a peace talk to think about what the triggers are that lead to trouble -- and engaging in a fight after being provoked IS bad too, he has to have other options at his disposal for handling run ins. Are there particular kids he's having problems with? Is he being harassed or bullied on a regular basis? Is HE struggling in school in some way you're not aware of? Does he need support or intervention in some way that he's not getting?
Time to get all these people on the same team, while showing them that you are willing to listen and cooperate in your son's and the school's best interests.