In the summer of 1983, 4-year-old Tiffany Gill and her mother, Colleen Gill, were found brutally murdered in their St. Louis, Missouri, home on July 31, 1983. The family had recently moved to the house; they ran a hair salon in nearby Des Peres. Tiffany was survived by her father, Thomas Gill, and a one-year-old brother, Sean.

Investigators later obtained confessions from serial killer Tommy Lynn Sells, and law enforcement linked him to the deaths of Tiffany and Colleen through his admissions and subsequent investigative work. Sells was convicted for other murders and was executed by lethal injection in Texas on April 3, 2014.