this broke my heart.

If the roles were reversed and there was video footage of Mr. Tomlinson giving a savage blind sided push to a police officer minutes before a fatal heart attack you can be DAMN SURE that he would be charged with a violent crime.

Tomlinson had a fatal heart attack a few minutes after that footage, and, despite treatment, died. There were conflicting reports of what had happened sent out on the day, which look like a cover-up: http://www.guardian.co.uk/uk/2009/apr/09/g20-police-assault-ian-tomlinson-g20

so sad

That's terrible.
He was clearly in a place he was not suppose to be (evidenced by the lack of anyone else but him and the police), and the police knocked him down?
Really?
That's all they did? Hang 'em ALL I say. :P

Did I miss the part where someone died?

crazy and sad, but this is a good example of journalists doing what they're supposed to - investigative reporting and making news.  Thank God they got it on camera.