The story is a bit more complex that the video title suggests. The dude wandered into a CC class at a gun range during a break, started rummaging through a student's bag, got detained and taken outside with police called and students around him to prevent him from fleeing. When the police arrived he refused to cooperate, acted like he had a weapon, and an officer tried to take him into custody. He resisted and tried to attack the officer with a screwdriver. Police officer(s) and range staff shot him.
I suspect the dude either has a record of mental problems or a record of drug use, and very possibly both. The dude's cumulative total of dumbassery was pretty amazing.
Why the skin color of the deceased thug-wannabe, range staff, class, and police officers matters eludes me. Has Race-Huckster Benjamin Crump been sighted in Vegas?