The Bentley is unknown AFAIK...but I doubt it in unknown to LE. There was an alleged friend of AS who said she drove a white Porsche SUV, but that has not been seen or mentioned by anyone else, AFAIK. She may have traded that in for one of the other known cars, and the friend wasn't aware of that.
Or they could both be missing, and LE for some unGodly reason, hasn't made that part of the crime. Which I think would be rather strange, considering...but according to many here, there are much more strange things happening with this case!!!