The Portland Police Bureau took what would have been a highly unusual step for a police department in another age. After Portland mayor, Ted Wheeler, who was forced out of his apartment by rioters breaking windows in the middle of the night and making life for fellow residents untenable, ordered the police to stop using CS, the compound 2-chlorobenzalmalononitrile, which is often described as tear gas, they turned to the public.
Banning the lawful use of CS will make it very difficult to address this kind of violence without resorting to much higher levels of physical force, with a correspondingly elevated risk of serious injury to members of the public and officers. CS, while effective, is a significantly lower level of force than impact weapons, which would very likely be necessary to disperse riotous groups with its prohibition. We do not want to use gas. We do not want to use any force.
There remains an expectation that police will make arrests for crimes committed in civil disturbance events. The inability to use CS means this task will require higher levels of force to accomplish.
