Don Maggiar was 20 years old in 1973.

She lived in the small town of Chessening, Michigan, with her husband and one-year-old son.

On January 27, she decided to do some shopping.

She would get groceries and then visit the mall in the next town over.

She put on her black sweater and blue slacks, followed by her brown leather jacket,

because it's cold in January and Michigan.

She kissed her family goodbye and set out for the store.

None of them knew she would be saying goodbye forever.

From A&E, this is Cold Case Files.

Dawn's car seemed to be having issues as she made the drive,

so she stopped at a service station for help.

They charged her car battery while she called her father-in-law to ask if she could borrow his truck.

When the car was charged enough to make it to her in-law's house, she drove there and traded her car for the truck.

At around 4 p.m. she once again left to go shopping.

When Don didn't come home, her family began to search for her.

And though they didn't find Dawn, they found the truck she was driving, abandoned in a store parking lot.

The driver's side door was unlocked, and one of the

keys from her key ring was found in the seat, and another was on the floor. They assumed that she had

finished her shopping because bags of groceries and clothes were found in the truck. One of the bags

was new baby clothes for her son. Dawn's husband contacted the police and showed them what they had discovered.

No witnesses came forward in Don's case, and the evidence in the truck didn't provide any clues

to where she might have gone. So, all the police and Don's family could do was wait.

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