A while ago I made the Red John/Bertram 666 theory/clue. I was recently informed by a fellow member her that carmen lee, the name Lisbon was called in the hospital, also adds up to 666. Thank you for that information. This makes my theory even stronger as heller is obviously yet subtly hinting back at the names which add up to 666. This can't merely be a coincidence as Patrick alone equals 666 and Jane alone equals 666 but patrick jane together doesn't. He meant for this to be found and it has purposely added them in. The carmen lee hint was added in hoping someone would find them and piece them together. since only Gale bertram equals 666 in the suspect list, as well as Red John himself, Bertram has to red john.
Checkmate heller. We've found you out and solved your puzzle. Game Over.
P.S. if you'd like to check the names yourself you can go to openjs.com/666namefinder