βIn a statement, acting Park Police Chief Gregory Monahan denied that tear gas was used to clear the crowd and said officers used smoke canisters and pepper balls only after protesters tried to grab their weapons and threw projectiles at them. Video of the scene didn't show protesters grabbing at weapons, although some started throwing projectiles after officers began shooting flash-bang grenades at them.
Reporters, protesters and bystanders who were at the scene β including a priest β said tear gas was used.β
Link: From crowd size to tear gas trump cannot get it right