and had threatened armando lazo with that." reporter: that was before the shooting. >> before the shooting, yes. >> reporter: after the shooting? >> when questioned by police, rudy flores admitted to being in the vicinity of the shooting at the time of the shooting. but from what we can see, the police department never really followed those leads 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 there was one more lead that the el paso police didn't pursue. the night after the teens were murdered, more gunshots were reported in the same neighborhood. the cops responded. a .22 caliber weapon was recovered -- the same caliber of gun used to kill the two teens. guess who was there, at the time and place of the second shooting? rudy flores. were the shootings connect

you have to drive across town to find his friend armando lazo. bobby and mando. they'd be in their 40s now, who knows what they might have become. if they hadn't gone to that easter weekend party with jesse hernandez the one they were walking home from when they were attacked. jesse never really let go of the guilt and after mimbela came to call? >> i started thinking about it how i lost mando and bobby. and my last image of mando. i never got to say, you know, you know, "i'm sorry. i love you brother." he was taken from me. to hate daniel villegas. the kid convicted of killing his friends. and then he read the confession and realized it could have been him in prison instead of daniel. >> i kept thinking of daniel, like, how could they do this to him? and he was like me. he just wanted out. he just wanted to go home. and i'm pretty sure he just did sign, did whatever they wanted. >> a reporter: thinking he could go home? >> exactly. i had to do something. >> reporter: and so he called john mimbela. >> i said, "john it's gonna be hard for me, but i'll do what i ca