I'm glad i found this site and the fans on here that i can chat with about the show. It's one of my favorite shows. House(rip) Breaking Bad, Person of Interest, Justified. The Walking Dead, Dexter, Homeland, The Mentalist, Elementary, Monk(rip)Psych, and Seinfeld reruns are classic and never get old.
Also, If you enjoy The Mentalist, Then you'd enjoy White Collar.
If you guys don't mind, i would like to submit my opinion. I have no theory about who red john is. But i have a few comments based on simple deduction i have deduced during the series.
Bret Stiles, J.J. Laroche, Gale Bertram, and Walter Mashburn (no particular order) are all decently plausible suspects. I'll throw in Susan Darcy just so my list won't seem sexist.
Grace Van Pelt, Oscar Ardiles, Wayne Rigsby, Summer Edgecomb, Lorelei Martins, and Harker Rosalind are all too young to be red john
i consider Minelli, Lisbon, Hightower, Cho, and Frye as friends of Jane, So i doubt it's any of them.
Stiener, Wainright, O'Laughlin, and Bosco are all dead, So it's not them. they are dead with witnesses to their respective deaths