The video uncovered by the Guardian and apparently shot by a New York banker, shows Tomlinson walking along slowly, hands in pockets, away from a line of police who are handling dogs. They are moving forward behind him, when one apparently gets impatient, lunges forward and sends Tomlinson sprawling to the ground. There is an audible crack at this point, though it’s impossible to tell where it’s coming from.
Tomlinson is then helped by two protestors, and seems to be asking the police what the hell they did that for. One of them appears to answer very aggressively. Though in reality it’s hard to tell who is talking. The video then shows Tomlinson getting up and walking away dazedly. A few minutes later he collapsed.
The Guardian’s voiceover also points out that the police “initially said protestors impeded medics from treating Tomlinson”. No more comment is made, but at least this indicates an awareness of the contrary evidence put forward by other eyewitnesses (video at the foot of this post).