[LINK IN BIO] A Las Vegas man was sentenced to at least 20 years in prison for shooting and killing the owner inside a business. Read what blood tests found in his system and the paranoid thoughts Surveillance video inside a vape shop in Las Vegas shows an owner defending himself with a knife from would be robbers. , On Aug. 3, Johnny Nguyen, 22, was captured on film stabbing one of three Surveillance video inside a vape shop in Las Vegas shows an owner defending himself with a knife from would be robbers. On Aug. 3, Johnny Nguyen, 22, was captured on film stabbing one GRAPHIC: Smoke shop owner fights back, stabs attempted robber Johnny Nguyen was the owner of a vape store., Tired of being robbed, he decided to prepare himself for another robbery., Security cameras captured when two guys entered the store , At first he tried Boy stabbed to death inside vape shop after being chased and attacked by gang