On the night of February 13, 2000, 16-year-old Columbine High School student Stephanie Lynn Hart-Grizzell went to a Subway in Littleton, Colorado, to wait for her 15-year-old boyfriend, Nicholas Nick Ray Kunselman, during his late shift. After the shop closed, someone entered the restaurant and both teenagers were shot and killed behind the counter. Their bodies were discovered about 12:47 a.m. on February 14 by a coworker who noticed the lights were still on and reported seeing a man he did not recognize leaving through the back door.

Investigators developed a person-of-interest description: a white male, about 16 to 20 years old, roughly 5 feet 7 to 5 feet 8 inches, clean-shaven with blondish hair, wearing blue jeans, tennis shoes, a black ball cap and a black coat that may have had red lining or been worn over a red shirt. Hundreds of leads have been pursued and various lines of inquiry, including a possible drug-trafficking connection, were explored, but no arrests have been made. A reward now stands at $100,000 for information leading to an arrest.

Anyone who knew Stephanie or Nicholas, worked at that Subway, or saw someone matching the description around closing time is asked to come forward with information.