Police stopped them because they matched some armed robbery suspects. When the police tried to search them then this boy ran and then pulled out the gun and pointed it at the police.
The boy got what was coming to him. sometimes Stupid does hurt. The same kid was mostly likely an armed robber to boot.
A similar thing happened near Baltimore a few years ago. Fortunately a security camera caught the event. A knuckledragger was moving toward a cop who had his gun out. Knuckledragger has his hand behind his back and pulls out an empty hand. By the time his had was out, he had six in the chest.