Found it in Edgewater, Fl.

Was found same day it was lost and stated it was in a minor accident.

If this ever happens the first thing to do after the ploice report is contact the gas stations you stopped at and take a look at thier camera's. Should be able to tell between what points you lost and narrow the search a good bit.
How things like this happen I have no idea. They must have no even bothered to strap it down and just relyed on the trans being in park. That might wor for hauling it a few blocks but if you ever bother to hit the highway without some straps or other form of securing it then you must be and idiot.