A woman reported spotting Eric Frein Friday night in a wooded area near a Pocono high school with his face covered in mud and carrying a rifle, Pennsylvania State Police said Saturday.

Lt. Col. George Bivens said the latest sighting was from a woman out for a walk, who said she saw Frein near Pocono Mountain East High School and she was 15 to 20 feet away at the time. Frein went to high school at Pocono Mountain East, police said.

Bivens called it a highly credible sighting and said state police have moved their search area south to Paradise and Pocono townships in Monroe County.

Frein is accused of opening fire on two state police troopers Sept. 12 at the Blooming Grove Barracks in Pike County -- killing 38-year-old police Cpl. Bryon Dickson and badly wounding Trooper Alex Douglass during the shooting. Frein, believed to be armed and dangerous, is on the FBI's most-wanted list.

Police also found blood at two homes that they are testing, as well as discarded items that they are investigating, Bivens said.

Police are asking ask people to call the tip line at 866-326-7256 or 911 if they see anything suspicious.

Bivens said state police would not require schools to close, but would make recommendations to the school district.

Investigators have spoken to Douglass and Bivens said he spoke with Douglass as well.

"He is in good spirits and is doing well," Bivens said.

Asked how much the search for Frein has cost, Bivens would only say police are under the $10 million mark.

"We're not going to rest," Gov. Tom Corbett said at the news conference. "Nobody's going to stop until we find this individual and he's apprehended."

Corbett said police and officials were thankful for the community support, from cards and letters to local restaurants providing food.

"I know it might be hurting their bottom line," Corbett said. "I know this has been trying on everybody."