Crime District attorney praises officer who shot man who killed two Black bystanders moments earlier Nathan Allen, 28, shot and killed David Green, a retired Massachusetts State Police trooper, and Romana Cooper, an Air Force veteran, after emerging from a stolen truck that he had crashed into a building, authorities said. Signs and flowers are attached to a fence outside a building, June 28, 2021, in Winthrop, Mass., where an armed man crashed a hijacked truck on June 26, then fatally shot two people before being killed by police. AP Photo/Steven Senne, File BOSTON (AP) — A police officer who...