This article is a theoretical inquiry about the death of the Brazilian citizen Jean Charles de Menezes, shot in London at Stockwell tube station on 22 July 2005 by unknown specialist firearms’ officers. The previous day some stations of the Tube were struck by failed bombing attacks. The police were chasing four suspects. Some hours after the murder, de Menezes was discovered to be innocent and not involved in the terrorist act.

Section 8 of this article include a short addendum "False Positives".