Oh, sure, people in their 20's are always being found lying (or floating) around dead somewhere. And the bodies washed up separately... what the hell does that prove, considering that the bodies have been proven to be mother and son?
Obviously she went to the marina (by levitation--since her car remained in her driveway) to gaze out over the water, and just fell in and forgot how to swim.
I assume that Geragos included this in his motion: "And considering that I have to spend a lot of time doing PR for a case in which the client has much more money, it would be better if this murder case were dismissed, so I could concentrate my energies on Jackson. I need a win, in order to impress my client Jackson, so please dismiss this case."