There were six days of substantially false coverage about a man who apparently died of a heart attack as he walked home while a screaming mob of anarchists hurled missiles at the police officers who tried to help him. Any inquiry into this media misinformation will want to find out whether that was simply the hyperbole of ignorant reporters or the product of bad practice at the Metropolitan police, the City of London police or the IPCC.
It was the intervention of ordinary people with cameras who provided their own surveillance of the protest that first led to questions about that version of the truth. An investigation by the Guardian suggests that an inquiry may find evidence of officials giving an incomplete picture.
At 7.30pm on Wednesday 1 April, as Mr Tomlinson lay dying on the pavement near the Royal Exchange in the City of London, Sir Paul Stephenson, the commissioner of the Metropolitan police, was several miles away at a party at Peelers restaurant, on the fifth floor of New Scotland Yard, to mark the retirement of the assistant commissioner Alf Hitchcock.
According to one guest: "He kept going out into the corridor, on his mobile. He looked very unhappy, stressed."
Four hours later, at 11.36pm, Scotland Yard issued a press release (see below), that, we now know, was seriously misleading - not because it included a direct falsehood, but because it failed to include the most important part of the truth, that Mr Tomlinson died after apparently being struck and pushed to the ground by a police officer.