As monstrous as Gouker is, to my knowledge he's never killed anyone before. I do not believe his confession for this murder. Now, with his ex-wife I don't know...I"m sure her suicide was investigated, but with someone like Gouker can we rule out for sure that he didn't kill her? But again, I'm sure if it was a homicide it would have been discovered as that...hopefully.
My understanding is that the two people he robbed or whatever is was, he didn't kill them. The kidnapping elderly woman he let go.
I also think he actually "loved" Amanda (as much love as he's capable of), and I can't see him actually killing her son.
If Josh Young really killed Trey like I believe he did, with no remorese or nothing, I think that's really evil and I think he's even more evil than his Dad. I think Gouker is a bad, bad person, but I think Young has more like the psycho-ness in him that makes him even more dangerous.