I think FD was feeling the pressure of everything and went to JD’s New Cannan rental having knowledge of one sure thing on her schedule... the time she left to bring the kids to school. He might’ve already been there before she left to bring kids to school. Most people park the cars in the garage overnight not during the day...( as a SAHM you’re always on the run doing errands.) The moment she backed out of the driveway and hit the garage button, he entered before the garage shut. When she came back, he was already in the house waiting for her. Garage is an easy point of entry. Maybe he hit her with some object first to knock her out (causing the detected blood spray) so he could restrain her. One thing I feel sure about is JDs car was planted at Waverny Park to misguide LE/searchers and create a backdrop of a mom lost or abducted while running which she was known to do according to her blog.