OK. So, in my mind, I came to this. Not much.
There's a reason PF felt he could ask KK to murder KB.
There's a reason he felt she wouldn't say anything about his asking her to commit murder KB.
Unfortunately, I believe there's little left of KB. I don't think it was nearby. I don't think anyone cares about the burning laws, etc. I know it's been mentioned before. Timothy Bosma comes to mind. The Eliminator. Sorry for the inference.
State Of The Art Incinerator:
I swear. I have friends who know things about me that might curl some peoples toes. There is no friend, ANYBODY, I would feel safe enough to even bring up the notion of killing someone. I cannot even fathom someone asking someone they knew to even think of doing this. I know other people think differently or do things for someone for love, but, he thinks so highly of himself that KK would do this because he asked? Keep it a secret because HE asked? There's a reason. KK's love for PF isn't doin it for me. I can't wrap my head around that. That's just me. I know it's been done before for the same reason. It's just a big no for me.
IMO, there must be something else incriminating PF in this murder besides KK's say so. There's a reason he's on one side of the bars and she's on the other. There's also a reason PF's lawyer needed more time to get stuff done. PF's lost his swagger - although it's probably real tough with ankle restraints. There's no steely eyed stare down. IMO. Maybe even HE was shocked by what he read.
One last thing. I know nothing about this, but, if anything pointed to KK, wouldn't she be the one behind bars? I can't see it being that she's helping police, so they're not arresting her.
All of this is just some of my thoughts.