An update to this.
Mr Tomlinson, the fellow who died at the G20 protest, was initially claimed to have died of a heart attack.
There's been a fresh post-mortem. It wasn't a heart attack, it was abdominal bleeding- haemorrhage.
A charge of murder seems so much more reasonable. They beat him up on his way home to his wife and kids, and he died of internal bleeding before he even got out of the protest area.
http://news.bbc.co.uk/1/hi/uk/8004222.stm
Also of note, a lot of people have been coming forward with their own photos and videos depicting this and many other acts of violence by the police toward the protesters. We have all the evidence you could possibly want short of DNA to be able to point at the police force, label them for the thugs they so often are, and demand a complete restructure.
I don't object to a police force within Britain, in theory. They can be useful- they can have special training and equipment to catch the violently insane, rapists, etc, and they can be figures of reassurance and authority to help us and give us directions when we're lost. Since they seem to have forgotten these roles, though, sod em.