The murder of Rachael Runyan is an unsolved child murder which occurred in Sunset, Utah, on August 26, 1982, when a three-year-old girl was abducted from a playground and murdered by an unknown individual.
Her body was found three weeks later in a creek bed in nearby Morgan County.One of Utah's most notorious cold cases, Rachael's murder ultimately proved a catalyst to establish the "Rachael Alert" child abduction alert system, which remained in use in the state of Utah until 2003, when the state adopted the national AMBER alert child abduction emergency alert system.The abduction and murder of Rachael Runyan was a factor in the 1983 passage of the US Congressional Missing Children's Act, which mandated an allocation of additional resources for the investigation of ongoing missing children cases.In 2017, the Rachael Runyan Missing and Exploited Children's Day was signed into legislation in Utah.
The purpose of the annual observance is to raise public awareness of missing and exploited children within the state; the annual awareness date is August 26, the date of Rachael's abduction.
As of 2019, Runyan's abduction and murder remain unsolved.