Sam Parker

From the trusted team behind 48 Hours, welcome to Case by Case, your weekly update on the biggest true crime stories unfolding right now.

From high-profile trials and stunning evidence to major breaks in cold cases, we'll follow it all Case by Case.

Follow and listen to 48 Hours Case by Case wherever you get your podcasts.

She was the middle sister and I was the youngest.

Teresa loved everybody.

She loved family.

That was the most important thing to her.

You think of the best sister you could have and she was, definitely.

When I hugged her that night, I just got this feeling that I was never going to see her again.

Saturday, I just kept trying to call her.

I called her just over and over and over.

I was kind of worried about you.

I was so panicked.

She is nowhere to be found.

And you don't want to think the worst, but, I mean, you do.

Every morning when I open my eyes, I think about her.

You know, at night when I lay my head down to go to sleep, I think about her.

You know, Teresa, where could you be?

It was the first day of spring, March 21, 2007, a time of new beginnings for Teresa Parker, according to her sister, Christina Hall.

She was at my house Wednesday night for about an hour, and we talked, and she wanted me to go to her new place.