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It's so hard to just gather that someone who was like a mother to my sister and I, did just vanish.

You know, and it's exactly what happened with her.

I don't think she left on her own. I really don't. I think she was forced to leave.

We may be grasping up thralls too because it's been 15 years and we still have no answers.

A couple years ago and I want to say probably years ago, four years ago, my grandmother did put up $10,000 reward.

And we did get like a five-second nip it on the 11 o'clock news at that point.

It did reach the Charlotte observer. It was ran in the paper, but that is it. The media just never picked it up.

On March 6, 2006, the fire department was called out to the Melrose apartments in Concord, North Carolina.

There was a fire inside one of the units. After the blaze was extinguished, they continued looking to see if anyone was injured or deceased inside.

But they found no trace of anyone inside the apartment. They learned that the apartment was leased to 43 year old Pamela Callahan.

And no one could find Pamela anywhere. The fire was later determined to be arson. This was just the beginning of the nightmare for Pamela's family.

And more than 15 years later, what happened to Pamela Callahan remains a mystery.

Amarissa and from Wondery, this is episode 316 of The Vanished. Pamela Callahan's story.

Concord, North Carolina is one of the largest cities in the Charlotte metropolitan area.

The population in this area has exploded over the past 20 years or so. But back in 2006, when Pamela Callahan disappeared, it was a much smaller place than it is today.

Pamela was living alone at the Melrose apartments on Country Club Drive when she vanished. Shortly before the fire was set in Pamela's apartment, her family had become concerned when they were unable to reach her.

But they thought that just maybe she was visiting with someone and would be back in a day or so. It wasn't until they drove by and saw firefighters on scene that they knew that something terrible must have happened.

Before we get too far into the details of what transpired in early March of 2006, we're going to take a look back at Pamela's life.

We spoke to Pamela's niece, Jamie, who explained how close of a bond she shared with her aunt.

So my aunt was Pamela Callahan, what's her name? She is my dad's sister and she never had any children of her own. She was a middle child and the only girl born to my grandmother and grandfather.

She never had any children, but when my dad had me and then of course had my sister, she was very nurturing, very maternal life. Matter of fact, she had married a gentleman, we, my sister and I actually lived with her for a time while we were in middle school as she was trying to help out my grandparents because they were good bit older.

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