De Menezes officer knew he wasn't bomber
Surveillance officers following the 27-year-old formally identified him as not being Hussain Osman, who they were hunting over the failed suicide attempts on London's transport network the day before.
Commander Cressida Dick, who oversaw Operation Theseus, ordered the surveillance Grey Team to stop Mr de Menezes and question him about the area in which he lived.
He had been spotted in Scotia Road in Tulse Hill, south London, which was linked to 28-year-old Osman after the terrorist's gym card was found bearing the same address.
But despite being negatively identified "in minutes", Mr de Menezes was followed from his home, onto a bus and into Stockwell Tube station where he was killed on July 22, 2005. Link