flores brothers. javier, now dead, and his brother rudy. both had been cleared by the cops. but this was weird. the flores brothers were known gang-members, and according to the murder victims' friends, rudy had a particular dislike for mando lazo. and just two weeks before the shooting -- >> rudy flores, , cording to what we know from m lice documents had said, "he was going to kill armando lazo and had threatened armando lazo with that." and police had investigated those claims. >> reporter: that was before the shooting. >> before the shooting, yes. >> reporter: after the shooting? >> when questioned by police, rudy flores admitted to being in thnity of the shooting at the time of the shooting. but from what we can see, the police department never really followed those l lds thoroughly. >> reporter: so, attorney spencer wondered, why didn't the police follow the rudy flores lead more aggressively? >> they did not even look at rudy flores's statement that he puts himself at the scene of the crime. if they just looked at that they would've seen there's something wrong here. >> reporter: and ther