I tend to think so too, since she just happened to be in town at the time of Levy's disappearance. Here's my speculative scenario (since speculation seems to be the order of the day around here):
Chandra had told her folks that 'something big' was about to happen. Also told her landlord back in January she expected to move in soon with her (ahem) 'boyfriend'. So, she goes to meet Mr. and Mrs. Condit for the showdown, where the happy couple break the news to Mrs. Condit that it's over for her. The Mrs. freaks out, pulls a gun a shoots Chandra in a jealous rage. They keep the body somewhere for almost a year, then dump it in Rock Creek.
Plausible, you have to admit. Maybe the DC police should carefully check Mrs. Condit's hotel room for bloodstains.
There's an Arab connection. Condit was known to 'run' with Arabian ambassador-types; this fits nicely with D.Dunne's "Horsewhisperer's" story.
Condit wanted Ms. Levy out of the way and the Arabs were waiting in the parking lot to either kidnap her (after making a rendevouz with Condit) or give her a ride (as Ms. Levy knew some of Condit's running buddies).
Ms. Levy was taken to a plane bound for, God knows where, where rough sex took place and got out of hand OR Ms. Levy was snuffed shortly after being abducted per wishes of Condit.
Just my opinion.
Or maybe check for thumbless prints.