Ellis Mars is Red John.

1)If we watch the episode called "Red Moon"in the third season. Todd Johnson (RJ disciple) show us all the time his little act of "revenge", but changed COMPLETELY his behaviour when he saw Ellis Mars. Todd Johnson could kill him . Why he didnt shot him? Because Ellis Mars is Red John. He was his leader thats why he did insist in his innocence.

2)Besides when the police told Todd that was found hair of his girlfriend in Mars's car he reacted surprised saying ''That doesnt make sense"' . He is not angry like happened with the other guy in fact he is nervous. Todd could be saved if Ellis goes to jail. Why did he covered him? Because Ellis Mars is Red John.

3)Todd died in prison because he knew that Red John is Ellis Mars. Its  the only motive for his death. He wasnt relationated to Red John in other way.

4)At the begining Ellis Mars says the killer will attack again He know it because Todd Johnson (theassassin ) is his disciple.

5) Ellis Mars has a tiger in his business card.

6) He waited patiently many hours to see Lisbon without distraction. Just like Sophie Miller said when he was at the waiting room before therapy.

7) He has all physical characteristics that Rosalind and Sophie told us. Height, age, strong hands,soft voice, etc

8) He is well spoken, good posture, just like Sophie said.

9) He is a "'psychic"', same as Patrick. Thats why he could identificate that PJ was a fake and did write him in the letter after the murder of his wife and daughter. Also thats why Kristina was interesting for him.She is a psychic too.

10)He is similar to Patrick, both are masters of manipulation and behaviour like Lorelei said. Also that explain why RJ is full of friends.

11) Mars. God of war acording roman mitology. He is relationated with the color red.

12) He continually is giving pats on the shoulder to everybody. Just like RJ did it with Jane at the end of season 2.

13) 'He is Mar"  writed on the bathroom. In spanish would be  "El es Mar" it sounds like Ellis Mar  Remember it was in Mexico. The prostitute probably writed. (her body is nearest to the wall)

14)When he meets PJ he says "I forgive your brusqueness. I can tell that you have been visited by great tragedy."

15) Nobody believes  that Ellis Mars is Red John. In The Mentalist the
killer is always the most unexpected person .Also thats why Bruno Heller
told we will be dissapointed when we discover who RJ is it.

16) He is on the list. Not in the final seven suspects but his name is writed in Jane's notebook. Bruno Heller said "the list is real ""but he didnt say what list it is!

 Sorry for my english. Greetings from Uruguay.