Search efforts that included dive teams and underwater sonar to probe a canal came up empty Friday in the hunt for a 27-year-old Jackson County woman who has been missing for a week.

Sheriff's Sgt. Pat LaBarbera said search dogs were also used in the effort to locate Alisha Sidie of Hatfield, the mother of twin 2-year-old boys.

"It's tough coming up empty-handed," LaBarbera said.

"I'm the father of a 17-year-old daughter," he said. "I just can't imagine what (her) mom and dad are going through, the pain that they're suffering. ...

"We want to bring her home very badly and we want to do that as quickly as possible."

Sidie's former husband, Doug, told authorities she walked away from the home they shared the previous Friday night after they argued. He reported her missing the next day. Authorities have said the couple were divorced but had been reconciling.

Doug Sidie has met with investigators on several occasions and been "very cooperative," and he also joined in the search one day, LaBarbera said.

"It's got to be pretty difficult for him, too," he said.

Scores of volunteers searched the densely wooded area until that part of the effort was called off Thursday. LaBarbera said they covered about 1,200 acres.

In addition to the woods, the nearby area has the canal, the Black River and Lake Arbutus, a widening of the river created by a dam.

LaBarbera said there was no one in custody, and there was no evidence as yet that any crime had been committed. It remains a missing person case, he said.

In Madison, Attorney General J.B. Van Hollen said the Wisconsin Clearinghouse for Missing and Exploited Children and Adults is assisting the sheriff's department by distributing a flier about the case, including a photo of Alisha Sidie.

It notes that the missing woman was wearing a white long-sleeved shirt, blue hospital scrub pants and white tennis shoes when last seen.

LaBarbera said the fliers would be distributed to area hunters preparing for the gun deer season that opens Nov. 22.