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 In a jarringly cold moment, Johnny Nguyen, a sales clerk working in a shop, stabbed one of the two young robbers attempting to rob his shop with ski masks., In his defence, Nguyen said he assumed they Police: Adult son arrested for stabbing mom to death on Mother's Day LVMPD investigating smoke shop robbery where victim stabbed one suspect