Bear spray is actually 90% less potent than the pepper spray police use on people.
Generally they also train with it so they know the effects.
An article I read said they were working on the theory that he’d invested the bear spray.
https://www.wxii12.com/article/chapel-hill-man-charged-assault-officer-capitol-riot/35844171#
The video at the link shows a bunch of antifa types in full gear on a police line. (Face Masks) There was spray on both sides. I do not know if the accused were in that video, but people in helmets and masks at a riot does not say MAGA.