"From videos and photos of his assault demeanor and position, the assailant seemed both steady and resolved, signs of deliberate premeditation. It is clear that his plan and position had been scouted and rehearsed prior to the attack."
Probably a pro sniper in the distance and the kid was just the one they were going to shoot so no one would continue investigating. Doubt that kid could carry a big ladder by himself and a rifle and be in a crowd. Also doubt he was a good marksman. Just a sacrificial pawn.
NO
"From videos and photos of his assault demeanor and position, the assailant seemed both steady and resolved, signs of deliberate premeditation. It is clear that his plan and position had been scouted and rehearsed prior to the attack."
His clothes even blended in with the roof top color.
Probably a pro sniper in the distance and the kid was just the one they were going to shoot so no one would continue investigating. Doubt that kid could carry a big ladder by himself and a rifle and be in a crowd. Also doubt he was a good marksman. Just a sacrificial pawn.
You learn fast Grasshoppa!