To mr jane:
Yes dumar said rj was a friend of his fathers . Red john has been very close to the tanner family especially orville like u said BUT
That doesnt prove he was with rosaline. Rosaline was with a man who was with dumar but we assumed red john but it isnt proven. I think it was a misdirection by rj.
Thats why he put a smiley face on the wall becuase he wanted rosalines description to throw jane off