A local law enforcement officer reported a possible sighting of suspected killer Eric Matthew Frein near the Swiftwater Post Office on Monday afternoon.

Police failed to find Frein during the ensuing search near the post office on Upper Swiftwater Road, state police spokeswoman Trooper Connie Devens said in an email. The post office is less than a half-mile from Pocono Mountain East High School, where law enforcement converged Friday after a possible sighting in the surrounding area.

Frein, of 308 Seneca Lane, Canadensis, is the sole suspect in the Sept. 12 sniper attack at the Blooming Grove state police barracks in Pike County which killed Cpl. Bryon K. Dickson II, 38, of Dunmore, and wounded Trooper Alex T. Douglass, 31, of Olyphant.

Police on Monday also revealed that suspected blood found on two enclosed porches in Cresco last week does not belong to Frein.

DNA analysis on one sample tested negative for the 31-year-old fugitive, s tate police spokesman Trooper Thomas Kelly said in an email. The other sample was not blood.

"(State police) determined that neither of the two investigations are connected to the Frein search," Trooper Kelly wrote.

Frein has been on the run since the Sept. 12 attack, and state police believe he is now somewhere around the Swiftwater area, 10 miles south of his home.

The search has steadily moved south from Blooming Grove in the six weeks since the shooting. For a month, teams focused on a five-mile zone around Barrett and Price townships after a call was made to the Frein home from a cell phone police were tracking. On Friday, the search shifted further south, to Swiftwater, Paradise Township and Pocono Township, after a woman walking near the Pocono Mountain East High School reporting seeing a man 20 feet away from her, with a mud-covered face and holding a rifle with a scope.

The woman told Philadelphia ABC affiliate WPVI-TV the man she saw wore a dark navy wool cap with rolled up ends. She said he looked around as if he was searching for something or trying to determine which direction to go. She pointed a light toward him and illuminated his torso and face, she said. He avoided making eye contact, but did not appear startled, she told the television station. The woman spoke to the station on the condition of anonymity.

The school district was open Monday, though attendance was slightly down, said Wendy Frable, district spokeswoman. Normally, attendance is in the 90-percent range, but Monday's attendance ranged from 81 to 88 percent.

Students stayed indoors during recess, and athletic activities moved to other campuses. The only hiccup came as a road closure around Lower Swiftwater Road rerouted a school bus and caused confusion, Frable said.