His dedication to the job was a problem when it came to women. So much so he’d had to go to court just to be allowed to see his son, the boy’s mother having decided she hated him and all he represented.
It was being a father and seeing what was being done to young children, mixed with the systems inability to prosecute the perpetrator that drove Charlie to cross the line and pull the trigger. Being judge, jury and executioner didn’t sit well with Charlie but if it saved even one kid it was worth it. Even though incarceration meant he no longer got to see his own beautiful boy.