ylime11 -- it seems he used the Focus to dump her body off the Expressway very early Monday morning then left the Focus on the side of the road (after letting air out of the tire) on the Seaford-Oyster Bay Expressway approx 2 to 3 miles from their house, and walked home. Once home, he then grabbed her purse and a bag of lunch leftover from Friday and drove his yellow car back to where the Focus was parked, threw her purse in the bush and planted the lunch bag in the car. It was then that the highways guy came by and saw him run, crouched down, from the Focus, to the yeallow car, get into the yelllow car and drive away. Thus, no accomplice was needed.
Thanks Penelope! Makes sense now. This guy is trash.