Since i was there at the time of this event, i'll explain you what happened. TheGoodfather and i had revenge on you, we all gathered at PD and we were the one who shot you for revenge. But as your crew members were there too, they started shooting back and it was a crew war there. So it was a valid reason for your death at PD.
Edit: Also you need to provide some kind of evidence to prove your innocence. Like video or action logs. That'll be helpful. Your welcome