drug dealer augustus brown. >> did you ever know augustus brown? >> you had no relationship with him prior? >> absolutely not. >> velazquez's lawyers say finding out why brown picked him out in the first place may be the only way to know if velazquez got justice. >> augustus brown, the 20-year-old heroin dealer is this case. >> we're on our way to elmyra prison right now to go see augustus brown. we found augustus brown in state prison where he is serving time for forgery. we were led into a conference room and turned on our hidden camera. he told us about the day of the crime, how he met lorenzo woodford at the club. >> he was a heroin addict. >> brown said he fled right after the shooting, but two mornings later, detectives tracked him down. >> they snatched me up off the street early. >> he said he was in the precinct all day. that police sat him in front of a computer screen and asked him to look at pages of mug shots. he was shown 230 pages, eight photos per page. that's more than 1800 photographs. finally he says he spotted someone. you just