On the morning of December 12, 1910, a young socialite named Dorothy Harriet Camille Arnold left her home in the Upper East Side, New York City, after telling her mother she intended to go shopping by herself for her younger sister’s debutante ball.
However, the 25-year-old had told one of her friends a different version of the story: that she would go shopping with her mother to find a gown for the special occasion.
After Dorothy walked out the door, her family never saw her again.