This is continuing coverage in the trial of Donna Adelson from the Hidden Killers podcast and true crime today.

Now, back to the courtroom.

Back when I think I got a cell phone, we had a plan with a certain limit.

Now they're unlimited, but that was one of the reasons why call detail records were created, correct?

Certainly, billing purposes, yes.

And what about network load?

As far as the creation of records?

Yes.

So network load, there are reports that I spoke about the kind of specialty reports that are more of an engineering standpoint and are used by carriers to more effectively manage their network.

Amongst other things might be load, be something that they would be considering with those records.

Now the call detail records that you've testified about extensively over the last couple days, they do not contain precise geolocation data for a handset, do they?

The majority of the records that I've spoken about, no, do not.

And specifically, the records that you relied upon for mapping purposes that you displayed earlier.

That is correct. All of the records used for mapping are strictly cell site locations. So the

locations that you've seen were for the cell site or cell tower, the handset was communicating with,

not the cell phone itself. And using the cell site sector cell tower, the handset was communicating with, not the cell phone itself.

And using the cell site sector, you can at least identify where on a map a handsate could be.

Correct.

And so when you're mapping those dots that are on your maps, those are the cell sites.

That is correct.

They're not the handset.

Correct.

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