In the winter of 1986, the holiday season was just beginning for 31-year-old Mary Elizabeth Dahn and her family in Woodbridge, Virginia. On the evening of December 9th, she was working as a cashier at the Riverview Shell gas station, a business she co-owned with her husband, Stephen Dahn. The festive atmosphere of the season was shattered in an instant when a man named Tony Albert Mackall entered the gas station. Mackall, who had escaped from a halfway house less than two weeks prior, demanded m
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