[grobdriver]

Investigators found that on the morning Sherin went missing, someone had driven the family’s SUV away from their home in Richardson and didn’t return until an hour later.

Be interesting to learn exactly how they learned this.

Nosy neighbors?
Data logger in the on board GPS?

[sparklite2]

I have a plug-in that records my driving and driving habits, mileage, time of day,etc. It allows me to get a discount of over ten percent on my insurance. They could reconstruct something from one of those, I bet.

[Pining_4_TX]

Lots of cameras in the neighborhood.

[HeadOn]

“Data logger in the on board GPS?”

Ding ding ding! We have a winner!

Seriously - I have done a lot of work for a major corporation on GPS, etc. There are LOTS of ways to track anyone. Here’s what likely happened.

1) His SUV has an independent GPS and the car’s black box (yes - many have one, whether you know it or not) can be accessed in a murder investigation

-OR, even easier-

2) His SUV has a “hands free” phone feature which tells when the phone is, and is not, connected. If he has EVER said “OK” to an app on his phone accessing his data (try to load one without it), the GPS on the phone was active, and showed where he went while connected.

That’s how maps know where traffic is slow. They are accessing and posting speeds from everybody’s phones, very easily calculated with GPS. Lots of phones moving slowly or not at all in the same area? Road is coded RED.