Claire McCaskill actually said...

"So what I want to know is, what investigation began after that deposition?"

"We don't know how many people crashed because of this cover-up. We do know that many died, including Ms. Melton..."

"Well, that is incredibly frustrating to me, that you wouldn't have a simple timeline of what happened once you got that knowledge."

"Yes. Well, it is pretty important we figure that out."