seth and one is pablo, this is seth and this is pablo. they said good, sign your name on the back and she did. look at him and go well, been it's a perfect fit for them. >> police and prosecutors insist the case is solved. >> i have no doubt, what so ever, i'm convinced they did it. that gives me a good sense of closure. i think it brought a lot of closure to the families involved, too. they will never see daylight again. >> he continues to insist he's innocence and refuses to back down. after 18 years behind bars, he's about to be given one final chance to save his life. >> i had all the pain going through these trials. it's hard. it's so hard. ♪ in 2002, seth and pablo are awaiting execution on florida's death row.