PORTLAND -- The search for Kyron Horman - the boy last seen June 4th at Skyline Elementary School - resumed Sunday in heavily-timbered country northwest of Portland.

Multnomah County Sheriff's spokeswoman Mary Lindstrand told KGW that effortswere centered near Northwest Skyline Boulevard and Rocky Point Road and a gravel road in the Dixie Mountain area.

At least 40 rescuers and seven cadaver search dogs were a part of the effort. K9 units were provided by four search organizations. Police told KGW they had pinpointed 11 locations to search but only got to about half of them on Sunday.

Search coordinator Deputy Eric Gustafson of the sheriff's office said all the dogs used Sunday were trained to find human remains. The crews were looking at a six-acre area of steep slopes and heavily-wooded second-growth timber.

We know exactly what they are looking for. They are taking cadaver dogs. They are looking for a body. They are looking for clothing. They are looking for things that belong to Kyron Horman, explained former Portland homicide detective C.W. Jensen.

The search had been planned for months, but poor weather conditions forced a wait until this weekend, he said. The owners of special dogs used in the search said the animals did not work well in snow but recent conditions were good for sniffing out clues.

Lindstrand and Gustafson would not comment on why searchers were returning to these specific locations, but sources told KGW that recent search efforts have been based on further analysis of cell phone records.

Volunteer searcher Tony McCray said he has been on the Horman case since last June. He said spirits remain high among the volunteers.

McCray said he always thinks of Kyron and should he someday find the child's remains, McCray said he is confident the sheriff's office will provide the necessary psychological support staff.

Kyron's mother, Desiree Young told KGW she felt encouraged by the Sunday effort.

We are supporting the police and very hopeful that they are closer to finding Kyron, she said. We know they will find Kyron. They are acting on some new information that they shared with us. We are confident they are getting closer to bringing him home.

The last recent search effort focused on Sauvie Island.

More:Divers search Sauvie Island

Kyron was last seen June 4th at the school where his step-mother, Terri Moulton Horman, had brought him to participate in a science fair. She was the last person known to have seen him,

While she has not been labeled a suspect, much of the investigation has focused on her and her whereabouts that day.

She and Kyron's father, Kaine Horman, are in the midst of a contentious divorce.

Complete Coverage:The search for Kyron Horman

Read or Share this story: