Brett Buffington

They're hard to interpret.

It's just a bunch of data, and they're hard to read.

We have a system that we can map those and visualize that.

That's what we're looking at here.

And when we look at this data, we can actually see travel patterns, how people are driving around town.

A lot of people wonder, what is it that I do with my cell phone that creates some type of record that I can be tracked by?

And it's really anything and everything.

Sometimes doing nothing, just having my phone sit on a counter, completely in idle mode, but powered on, it is generating a digital exhaust, if you will, or a trail.

Red icons are Lintel's device.

Blue icons are Robert's device.

Where I'm starting here is we're looking at when both of them were at home before Lintel leaves her house that night.

We know that Robert Marks texted Lintel Washington.

He said he wanted to meet up.

She drove from her house up to Baker.

If you remember, red icons are Lintel's device.

Blue icons are Robert's device.

But you can see here briefly, we're starting to get a purple icon.

And of course, what we're seeing with the purple is that when red and blue are overlaid directly on top of each other, we're getting this purple color.

This is just a really good indication that these two devices are traveling together.

We're kind of out in the middle of nowhere now off of I-10, and both devices are going to stop together for a period of about 30 minutes.