Special Agent J.J. LaRoche is causing many problems for the CBI. He's played by Pruitt Taylor Vince.
LaRoche has reasons to question Van Pelt on the episode "Blood for Blood." A witness is killed while under her protection.
Isn't this romantic? Van Pelt makes time for a dinner with Craig O'Laughlin.

The Mentalist Season 3 Episode 14 Quotes

Jane: Did you know that Nevada is both the marriage and divorce capital of the nation?
Lisbon: They should put that on a license plate.

Lisbon: Sweetie, it's all right. We're with the CBI.
Jane: I know it sounds made up but we have a website and everything.