Philadelphia police probe possible extremist ties of suspected police shooter

Philadelphia police said on Sunday they were seriously pursuing a tip provided to a street officer on Saturday that the man suspected of shooting officer Jesse Hartnett had ties to a group with "radical beliefs."
Police are working with the FBI to verify the credibility of the tip related to the ambush shooting on Thursday, which led to charges of attempted murder, assault and aggravated assault against Edward Archer. He later confessed to the attack and said he pledged allegiance to Islamic State, police said.