In the season 3 of The Mentalist, Patrick Jane threatens J.J. LaRoche to expose his secret if he doesn't give him his suspect list. LaRoche's secret is something he keeps in a tupperware in his safe. Jane actually bluffs since he knows only of the existence of the tupperware, but has apparently no idea of its actual content.
Later on, Jane says that whatever J.J. LaRoche's dark secret is, it must be horrible.
Is there any clue to what J.J. LaRoche's dark, horrible secret is?