The Mentalist, Season 1

[Daniel has confessed to killing his father-in-law]

Lisbon:
Did your wife have anything to do with this?

Daniel:
No. No. She had nothing to do with this. And the idiot never suspected it was me. How's that for denial? How did you know it was me?

Jane:
Well, when we first met, you were more concerned about the college football scores than you were your father-in-law's murder.

Daniel:
So?

Jane:
So when you're searching for a killer, the degenerate gambler in the room is a good person to look at.

Daniel:
I'm not degenerate. I'm a professional. I'm just having a streak of bad luck.

Lisbon:
Yes, you are.