His gun, his pointless gesture.
Somehow he assumed the guilt for these murderers and instead of committing himself to work to get the help needed by these people he's decided he can solve the problem with a material gesture instead of putting the time into making mental health access easier.
Somehow he assumed the guilt for these murderers and instead of committing himself to work to get the help needed by these people he's decided he can solve the problem with a material gesture instead of putting the time into making mental health access easier.