No, I’m sorry, if a person was bullied for a year, that was the time for “due process” to protect them and society by preventing further harm. Now it is too late.
They caused someone to die by their violent actions, I am fully in favor of violent retaliation here, and as I said not looking to be convinced otherwise.
There are some things our society gets right, and some things it gets wrong. Passivity in the face of violence is a mistake IMO.