>> reporter: boney told him he'd been inside for robbery. >> and when i slowly started to let him know about some of the things that i did in the past, he asked me, "well, are you still able to get untraceable weapons?" "you know can you get an untraceable weapon?" >> untraceable. >> that's, that's what it led to, i'm just --. >> a clean, clean gun. >> a clean gun. >> throwdown gun. >> somethin' that can't be traced by law enforcement and ballistics. >> reporter: so boney said he scored a handgun the same day, met david again in a parking lot and handed over the weapon. he paid boney $250. but one gun wasn't enough as boney's story goes. >> he wants me to deliver yet a second handgun. and so, i followed mr. camm back to his house, i can see visibly exactly where he lives. >> reporter: as boney tells it, they spoke outside the house for just five minutes. boney asked when he should return with the second gun. >> i'm asking this man you know, what time, what time should i be back here?" "well, why don't you come back