Red John's "signature"; its eyes imply an epicanthal fold. When Caucasians draw a "happy face" it doesn't look like that. I'd be interested to see if that was a valid cultural difference, or just me making silly inferences. Hehe. He's also named after a serial killer (Scott Lee Kimball); AND Cho as a name has a legend behind it about a miraculous baby being born with the red Chinese (sic) symbol for "Cho" written under his arm. .

Easy.

Jane is just playing with his head to make him slip up.

I think it's Cho.  It needs to be someone that would blow you away.  Cho gravitates toward wounded souls (like Summer), is the guy who would be in charge of the team if Lisbon's head got cut off (per Lorelei's request), etc.  I think it's Cho.  Plus the spiritualist in that one episode said he had a "very red" aura, which I take as a winking clue, not a "real" clue.  But I still think it is him.

cho is never the one going after red john suspects. when they first met they shook hands and he has many links into many differant people.

I speak Spanish and Translated with google if you do not understand sorry
because few people think that Red John is cho for me is the main suspect alone.
look aside his description
Red John is a man. This can be determined from reports of Rosalind Harker (Alicia Witt), a blind woman and former lover of Red John who first appears in the episode "Red John's Footsteps". Harker's description, if it is to be Believed, Further That states he is "just under six feet tall, with short, straight hair, not muscular but not soft with strong hands." Harker's testimony may be Considered somewhat suspect, However, since she Seems to feel he is not a threat, nor does she seem to hold any antagonism Toward him, even after the CBI has insisted Red John is a serial killer.He enjoys poetry by William Blake (Red John quoted one line from the poem The Tyger to Jane at the end of season 2, this poem was again quoted by Gale Bertram, CBI director, in a press conference, the poem was Also Recognized by Agent LaRoche and Agent Kimball Cho in the episode in Which Hightower was framed).
good for me is what we will see from just
regards

I have evidence that Cho is Red John. He murdered Patrick Jane in Season 6, Episode 4. Plus he seems like the kind of guy who would be Red John. Or maybe Red John is O'Laughlin.

I think that K.C is Red John coz he is asian. I think that thwe shadow looks like an asian becuase he looks like he has eaten a dog