As all you who are up to date will know, the only three suspects as shown by heir tattoos are the sherriff, the fat cop and the head of the CBI. Out of these three, the only plausible option is that it is the Sherriff; he is tall like his blind lover is, obstinant and doesnt follow instructions like Patrick (when he ignores what Patrick says and saves him on the roof of the church) like Lorelei says etc etc etc...
Bruno Heller said that the real Red John is deffos one of the seven, which has now been whittled down to three, and as the psychiatrist said he is of medium build (so fat man cop out of the picture) and I think that if Ray was Red John, and he wanted to bug the CBI office all he would have to do was stay late when everyone had gone home...

So Sherriff all the way, but I reckon Bob Kirklands twin bro will pop up soon...I think he was mentioned for a reason...