Joe managed to kill Peter, but he ended up falling through a window, and later died in the hospital.
Lionel killed Peter in self-defense, but there were no witnesses.
But if you kill Peter now, it's not about defending me.
Yes, he had killed Peter in self-defence, but there would still have to be a police investigation.
Quite possibly by the same people who killed Peter.
The second guy was one of the creeps who had killed Peter.
We will also show that along with the means and opportunity to kill Peter, he had one hell of a motive.
If you kill Peter, simply put yourself in still more jeopardy.
Had he wanted to kill Peter, he could have done so back in the clearing.