CAMBRIDGE, Minn. (AP) — An extensive search of a rural area in Isanti County will continue through this week as part of an investigation into the 1989 disappearance of a Maple Grove teenager, authorities said Tuesday.
Police and sheriff's deputies have partnered with the FBI and the state Bureau of Criminal Investigation in a search involving 15 to 20 investigators looking for clues in the disappearance of Amy Sue Pagnac, Maple Grove Police Capt. Keith Terlinden said at a news conference.
Pagnac was 13 when she disappeared 25 years ago. Her case got renewed attention last month when police searched her parents' Maple Grove home.
On Monday, authorities searched west of Stanchfield in Isanti County, the Star Tribune (http://strib.mn/1mOo5n1 ) reported. Terlinden said the search will continue 24 hours a day through Friday.
Authorities have declined to say who currently owns the property, but Pagnac's family bought a farm in the area in 1987 and spent several years living there.
"This is important to us and this is important to the Maple Grove community," Terlinden said. "Our goal is just to find Amy. ... It's a process, and the process will be complete when Amy is found."
He declined to say anything further about the investigation, including whether authorities might have suspects in mind.
Pagnac disappeared Aug. 5, 1989. Her mother's husband, Marshall Midden, told police he and Amy had been tending crops on the family's Isanti County farm when he stopped at an Osseo gas station. He told police he used the bathroom, and when he came out, Amy was gone.
Pagnac's mother, Susan, has said she believes her daughter is alive.
Earlier Tuesday, Susan Pagnac told the Star Tribune she wasn't told by police that they were searching the area and doesn't know what they're looking for. But she said the family thinks the search — like last month's search of their Maple Grove house and backyard — is just to rule out steps in the investigative process.
"I assume they're just going through the paces that they did back then," she said.
Pagnac said police searched the property in 1990, but she doesn't know why.
The wooded property, located about 48 miles north of Minneapolis, has a dirt driveway that has been blocked off with yellow police tape. More than a dozen unmarked vehicles were parked along the street Tuesday, along with a Maple Grove dump truck.
Information from: Star Tribune, http://www.startribune.com