Evidence collected from the crime scenes in the Molly Bish murder will be submitted for enhanced DNA testing.
"The science is always getting better, Worcester County District Attorney Joseph D Early Jr. said. "We feel that the improved testing will help us in our efforts to identify Molly's killer or killers."
The upgraded tests will become available in September, and the improvement in DNA testing could make degraded samples usable for determining DNA.
Early made the announcement in advance of the 16th anniversary of Molly's disappearance from Comins Pond in Warren, Massachusetts, on June 27, 2000. Molly, 16, and a resident of Warren, was a lifeguard at the pond. Her disappearance set off a massive search.
Bish's remains were found nearly three years later in the woods of Whiskey Hill in nearby Palmer, Massachusetts.
Soon after taking office, Early formed a cold case squad to look at older cases such as Molly's. After meeting with Molly's parents, John and Maggie Bish, he changed the name of the unit to the Unresolved Case Squad.
"John Bish had asked me not to call it a cold case squad because he felt it made it seem the cases were on a shelf somewhere collecting dust, so I changed it," Early said. "These cases are not forgotten and they are being worked on continuously. We get tips on Molly's case every week and we track down every lead."