Ron - true enough, the witnesses reporting a man jumping the barriers. Apparently the man seen was one of the police team in pursuit. An easy mistake for a member of the public to make, to assume he was a suspect being pursued - but the police would have known instantly that the jumping man had not been Menenzes. The same goes for the stuff about the "bulky jacket".

The police knew these things were not true, but they chose to go along with them. Even to the extent of misinforming the coroner.