WARREN, Mass. -- The parents of missing lifeguard Molly Bish now know for certain that their daughter is dead. Investigators now believe Bish was murdered in the woods of Palmer, Mass., just miles from the pond in Warren where she worked and from where she disappeared three years ago.

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Gail Huff Reports On Investigation's Focus

NewsCenter 5's Gail Huff reported that the State Police Crime Lab in Sudbury, Mass., was instrumental in identifying Bush's remains, performing the DNA tests that enabled investigators to match bones that were found to Bish. Also, a new computer mapping system allowed searchers to zero in on an area where the remains may be located. Most of them have now been recovered.

"We're going to do everything we possibly can to find the person who did this," said Col. Thomas Foley of the Massachusetts State Police. He said investigators believe Bish was abducted from her job at Comins Pond and was brought to the grounds of a local gun club where she was murdered before being buried in a shallow grave that was a long walk from the closest road.

Authorities still don't know how she was killed, but the recovered remains show no evidence of bullet wounds or blunt trauma. They continue to search for a murder weapon and still plan to continue searching another 3 acres. They are also reinterviewing suspects, some of which are known sex offenders.

"We have 11 people who failed a lie detector test," said Worcester County District Attorney John Conte.

Bish's mother, Magi, said she saw a man in a white car near the pond when she dropped her daughter off for work June 27, 2000. His sketch was widely distributed. Monday, for the first time, the DA said he thinks the killer was probably a local resident.

"I think the very fact that the body was found here in Palmer, 5 miles from Comins Pond, leads us to believe that the theory that it may have been a local person comes to the foreground," said Conte.

So much time has passed that Conte acknowledges it may be difficult to determine a cause of death.