WASHINGTON (AP) — U.S. officials have arrested and charged two men with assaulting U.S. Capitol Police officer Brian Sicknick with bear spray during the Jan. 6 riot, but they do not know yet whether it caused the officer’s death. Thirty-nine-year-old George Tanios, of Morgantown, W.Va., and 32-year-old Julian Khater, of Pennsylvania, were arrested Sunday. They were expected to appear in federal court Monday. The idea that Sicknick died after being sprayed by a chemical irritant has emerged in recent weeks as a new theory in the case. Investigators initially believed that Sicknick was hit in the head with a fire extinguisher.