First one involves two groups of police sorrounding a group of protesters and tear gassing them.
I don't how that can be considered a valid dispersal method (They could not disperse there were police on both sides)
Also allegly firing Pepper balls above the waist which is incorrect usage. (There are marks on the walls well above head height)
If you made it practically impossable to disburse when using what are basically torture devices in that situation I don't see how it isn't brutality.