I went back and forth as to what was the first thing on the perp's agenda. Going out to the North East red area to dump the phone first seems weird. You've taken a great risk to grab someone - what's the main goal (I can't bring myself to even think along these lines)? I think even at the risk or the phone and fit bit leaving a digital footprint, his main goal was (whatever it was) superseded every thing.
The first objective after abducting Mollie is get out of town. I think that was from Brooklyn to 385 ave heading East. Maybe they stopped at the top right dot where he figure out what kind of devices she had. Maybe that's a location where Mollie's heart rate spiked. He drove South to the lower left right dot. That is where he stopped the digital signature - same area as the farm searches.
The question is, where did he go next?
East or West?