and that irsan placed a gun in his dead son in law's hands. >> when i spoke with him ali irsan deniedense. >> okay. did you set that meant up to be killed? >> no sir, i did not. no i did not. >> he says his wife and daughter who told investigators this story were simply lying. >> they've made up this story. >> so everybody is lying except for you? >> -- yes sir they threw me under the bus. >> if that 1999 case had been prosecuted differently, approached differently, a lot of people might still be alive. >> yes, we might not be here today. >> he got very lucky. >> it was almost like a perfect storm for him. i think it was maybe first murder >> and the homicide detective was brand-new. she hadn't investigated cases on her own. yet this was one of her first. >> had montgomery taken that investigation and worked it the way that they should have, we galareh and coty beavers would still be alive. >> there was no end to the one ifs cory beavers was haunted by the law that even after the death of his girlfriend, galareh, houston police might have done more. if they had taken the 1999 killing