Who is the female assassin on Kidnapped?

She was featured prominently in episode 09... anybody know her name? I think I've seen her in a supporting role (like somebody's sister or something) before on some show or movie... can't place her just yet. If you don't know who I'm talkin abt, she's the one who was gonna kill Schroeder's wife and pretended to be Schroder's wife when Knapp arrived? If anybody knows, pls reply thanks!