What have you asked him? And why would he give up? It's not in his best interests and there is nothing else to do in there.
I asked him a number of questions about the case , regarding the gun issues, possibility of Shelia being alive when the police arrived and his call from his dad , this was some years ago and although I still have his email I don't unfortunately have his emails still.
I've just checked his official web site and there is an "email a prisoner" email address, that isnt the one I have , the one I have is a personal email address , which i presume goes to his girlfriend? no idea but it does have his name in the address and as I said I always got a reply. Looking at his official site now looks like you can write or email him.
This was about 10 years ago and looking at his site he seems to have become more " popular" wow there is even a section to send him gifts and money on there and apparently it is now taking him at least 6 weeks to reply to queries