Do you think that the empty water bottles were somebody else's?
I wonder if DNA was checked on those empty bottles that were on the front seat. And I wonder if they were on the passenger's seat or driver's seat.
IMOO.
"His carwhich Ida says he lovedwas discovered the next day abandoned in the Long Island Rail Roads Deer Park station parking lot. Its keys were missing, the front seat was moved forward closer to the steering wheel than hed have it, and the trunk, where Mayer typically would keep his tools, lunchbox and water bottles, was empty; the latter found on the front seat."
http://www.longislandpress.com/2013/08/31/vanished-dix-hills-father-still-missing-after-2-months/