The US experienced another mass shooting when a gunman shot and killed four people and wounded three others, including a police officer, in Colorado before he was killed by police. The suspect in the killing spree late Monday evening across the Denver metro area and a neighboring suburb — which included a car chase and gun battles — was identified as Lyndon James McLeod, 47, authorities said. He was killed in a shootout with officers in the Denver suburb of Lakewood, and his motive wasn'...