Police have arrested Jason Brian Dalton in connection with three shooting incidents that killed six people and injured two more in Kalamazoo County, Michigan, prosecutor Jeff Getting said Sunday. at approximately 12:30 a.m., police took Dalton into custody, ending a six-hour nightmare that brought Kalamazoo to its knees. Police seized a semiautomatic handgun from Dalton, whom Getting described as "even-tempered" at the time of his arrest. "There is just no question more people would have died if (police) didn't find him when they did," Getting said. Getting said police don't yet know a motive, but authorities are confident that Dalton acted alone, and that there is no connection to terrorism. Formal charges will be brought Monday, he said.