I'd agree that traceable rubber bullets is for much further down the line. First you need prosecution of any officer shown using a gun at a person's head or upper-torso when they're not responding to a situation of immediate threat of loss of life. Seems the evidence should be there for that.

Swift prosecution, and where appropriate conviction, of police abuses would help to quell the current unrest IMO. Like on Reddit yesterday I saw video of an officer placing a stick in an already subdued persons hand, then beating them in the head and retrieving the stick ... is there any reason that person isn't already in jail? They should fast track prosecutions, have them in prison - of found guilty - by the end of the week.

Swift, open and impeccable justice is called for.

You can't entirely blame individual officers IMO, watching riot footage knee-on-neck is clearly a widely adopted technique, presumably it's taught. And putting someone in a riot with a weapon, we should expect aggressive actions, it's a natural human response that can't easily be trained out.

Mandatory gun cameras for riot police might be useful as this point though?