My reading of the case is that the police didn't think he had a bomb, otherwise they would have shot him from a distance. They believed he was a member of a terrorist organisation, and they wanted revenge for the bombings. They had permission to kill if necessary, and ussed that as an excuse to lynch Menezes. And since discovering he wasn't a terrorist, they have been lying about the whiole affair. He didn't run, vault barriers, threaten, have anything concealed about his body- these are all lies made up to hide the disgraceful fact that once Menezes had left the house, they were always going to shoot him.