constance mcmillan

According to The Advocate, and the young woman herself: 

To avoid Constance McMillen bringing a female date to her prom, the teen was sent to a "fake prom" while the rest of her class partied at a secret location at an event organized by parents.

McMillen tells The Advocate that a parent-organized prom happened behind her back — she and her date were sent to a Friday night event at a country club in Fulton, Miss., that attracted only five other students. Her school principal and teachers served as chaperones, but clearly there wasn't much to keep an eye on.