[Toespi]

Ok, so she was injured in a plane crash and could not leave the ME because of injuries, which accounts for the period of time no one heard from her. When she is finally well enough to travel, she comes back to US and hospitalized in New York for additional treatment, for a “concussion.” It fits.

[One Name]

It fits. She’s been positively batty ever since, which also fits.

But wait, she may have been batty before...

I think it has something to do with Vince Foster and the other time she was shot down over Bosnia.

[piasa]

It fits. But then, so does a deer hunting accident. And then so does getting hit by a rebounding ash tray. And then, simply using a medical issue to avoid testimony until everyone could get their scripts memorized fits extremely well.