WOODWARD, Okla. (AP) -- Law enforcement officers begin the difficult task of searching by hand through mounds of trash in search of the remains of a missing 6-year-old boy.

Six people representing the Woodward County Sheriff's Department, the district attorney's office and the Oklahoma State Bureau of Investigation started digging through a targeted area of the Woodward landfill Monday.

They're looking for any sign of Logan Tucker, who was last seen alive in June 2002.

Undersheriff Monte Clem says searchers specifically want to locate a suitcase, plastic and rope.

Volunteers removed 150,000 tons of trash with bulldozers and backhoes to reach the 2002 trash level at the site.

Prosecutors charged Katherine Rutan, also known as Katherine Pollard, in February with first-degree murder even though no body was found. She remains jailed on $250,000 bail.

A judge last week denied a request to reduce her bail.

Authorities say a tip from a local man led them to the landfill.