ruvin brought in the dealer for questioning, a man named william woodfork. >> he was like, i have no idea who that is. i never met him. >> did you believe him? >> no. i knew eric called him and katrina identified him. >> ruvin hammered woodfork for hours and he admitted that he sold eric marijuana. the dealer balked when he said why did you go over to eric's. >> he was soed a ament, what are you talking about, not knowing where eric lives. he said i'm a wedeman. i'm not a deliverer. i don't deliver. people come to me. >> detective ruvin was not about to take a drug dealer at his word. >> we obtained a search warrant for his place and we recovered a safe and inside the safe was a 380 handgun. i was like, did he lie? this is our murder weapon. >> is this the same kind of gun that killed eric? >> same kind of gun. >> the gun was sent to the firearms lab to see if lieu vin would prove woodfork was in eric's apartment. but woodfork's dna and finger prints weren't in the apartment or anywhere else. >> was he on the security tapes? >> he wasn't on the security tapes. >> the test came back f