Some times bad behaviour catches up to people and they get Trayvon’ed.
I wouldn't use the word "Trayvoned" to describe it. It demeans what Zimmerman did.
Zimmerman was being assaulted. He had no other choice. His life hung in the balance. He then only shot Trayvon once to neutralize the threat. He didn't then get up and pump more bullets into him but reached for his phone to call the police.
This guy did none of that. He neutralized the threat and then while they lay there helpless he with deliberation murdered them.