This point is important. The police can't police themselves, and for a lasting solution to this problem to emerge there'll have to be major structural changes to the way police oversight and review is carried out.
I hope these protests are a turning point that'll lead to such reforms, but I suspect no significant changes will occur. Hopefully I'll be proven wrong.
Protests might have been unorganized, but riots most certainly are organized. Torching a police car carries a minimum 5 year sentence. It's not the protesters who are doing that.
Moreover, it is still being "organized". Someone keeps dropping off pallets with bricks. There are agitator leaflets all over twitter. People have been recorded on video handing out cash to "protesters" from a thick wad of bills. Someone is organizing and funding the riots.
The very next day we had several trucks unloading beds of bricks and large rocks throughout the Plaza (where protests were and would be again that night) throughout the day and people were snapping videos of at least two buses full of protesters in the full black getup unloading on the edge of the Plaza a few hours before sundown. That night we had 85 arrests, multiple cars set on fire, multiple officers put in the hospital, and plenty of CS gas in the streets.
After seeing the peaceful protest on Friday, I find it a little bit suspicious that the crowds grew so quickly and things escalated so quickly (and intentionally, by the looks of people dropping of brick caches) just 24 hours later.
It is more likely the police are doing this as a sign of their own solidarity with other police officers rather than with the protestors. After all, this entire thing started because of kneeling.