Dozens of police officers head back to their cruisers carrying rifles after searching the woods off Bear Mountain Road in Fairfield Thursday in the search for accused cop-killer John Williams.

A Maine State Police trooper prepares to search Bear Mountain Road in Norridgewock for suspect John Williams on Thursday.

Somerset Deputy Toby Blodgett lifts tape for a Bear Mountain Road resident after closing the road to traffic while police search for John Williams on Thursday.

Police cruisers from several agencies drive down Martin Stream road in Norridgewock to Bear Mountain Road in Fairfield during an extensive search Thursday for accused cop-killer John Williams.

A helicopter lands after searching for suspected police-killer John Williams in Norridgewock on Thursday.

Maine State Police Lt. Col. John Cote addresses the media during a press conference at the Grange in Norridgewock on Thursday.

Police officers are posted on the Bear Mountain Road while other officers searched the woods for accused cop-killer John Williams on Thursday.

Dozens of area agency police officers dressed in armor and carrying assault weapons converged on Bear Mountain Road off the Martin Stream Road in Norridgewock Thursday morning, searching for suspected police-killer John Williams.

Police assemble at the command center in Norridgewock Thursday morning to begin the second day of searching for John Williams suspected of killing Deputy Eugene Cole on Wednesday.

Special Agent Hank Shaw with the FBI Boston office addresses media during a press conference at the Grange in Norridgewock on Thursday, announcing the FBI is offering a $20,000 reward for information leading to the arrest of suspected police-killer John Williams.

Somerset County Sheriff Dale Lancaster addresses the media during a press conference at the Grange in Norridgewock on Thursday, saying the manhunt continues for John Williams, of Madison, in connection with the killing of Cpl. Eugene Cole.