[sjwright]

I agree with your sentiments, except

> Planting evidence into protester's backpack

Look at the video. The officer bends over to pick something off the ground and is not being subtle in any way in placing the items into his backpack. It's impossible to tell from the video what the items actually are, but it doesn't look suspicious to me. Perhaps a length of tube he was using to transport a protest banner? Whatever it is it looks like the sort of thing that would easily fall out of a loose backpack like his in a minor skirmish.

It could be the planting of evidence, but I don't think we have enough facts to make that assertion without strong qualifiers.