Prince William police identify remains from 1980s as Cynthia Joan Gastelle, search for killer Since 1982, a set of skeletal remains were all that Prince William police had; who the remains, found off Mountain Road in Haymarket, belonged to remained a mystery. Thirty years later, thanks to a national DNA database that found a match, police say they have identified Cynthia Joan Gastelle and are looking for her killer. Cynthia Joan Gastelle. (Courtesy of Prince William County Police Department) Gastelle was 18 when she was reported missing to Takoma Park police on April 3, 1980. In 2011, police in another jurisdiction collected DNA from her family members, looking for a match. They didn't find one. But, because of the database, Prince William County police did. Police said they will offer more details at a 1 p.m. news conference today. They are looking for help and information from the public in reviving the decades-old case. Peter Gastelle, Cynthia's brother, is expected to speak, as are officials from Takoma Park, Prince William and the state medical examiner's office. Police are asking that anyone with information about the case to call Crime Solvers at 703-670-3700 or 1-866-411-TIPS. Tipsters can remain anonymous and could earn up to a $1,000 cash reward.