Something interesting I noticed about the suspect list is all the photos Jane had (the one's Teresa laid out as Lorelei read the list) are current except McAllister's.  Take another look at the opening scene to Season 6, Episode 1.  The picture of McAllister is from his younger years.  I'm wondering why that is.  I'm not saying Red John is McAllister, I'm just wondering why Heller chose to show a younger picture of him rather than a more current one like he did with the other six suspects.