Martinez Long, 19, fatally shot Cameron Watkins at Fairlane Town Center in Dearborn, Michigan, on July 3 after Watkins killed one person and wounded another during a shooting rampage. Prosecutors and the judge agreed Long acted in self-defense or defense of others, but he was still charged with carrying a concealed weapon without a license, since Michigan does not issue concealed pistol licenses to anyone under 21. A judge sentenced Long to two years of probation under Michigan’s Holmes Youthful Trainee Act, requiring cognitive behavioral therapy, handgun safety classes, and a prohibition on possessing firearms during probation. The case illustrates…