The Mentalist, Season 1

The Mentalist (2008-) is an American crime procedural television series about a private investigator who uses his skills of observation to help the police solve crimes.

[Jane discusses Red John on a television show and returns home that evening, five years ago, and finds a note]

Red John's Note:
Dear mister Jane, I don't like to be slandered in the media, especially by a dirty money-grubbing fraud. If you were a real psychic, instead of a dishonest little worm, you wouldn't need to open the door to see what I've done to your lovely wife and child.

[Jane opens the door to find a red smiling face painted on the wall....]