Shortly after the Federal Bureau of Investigation declared them suspects in the bombings and released images of them , the Tsarnaev brothers killed an MIT police officer , carjacked an SUV , and engaged in a shootout with the police in the Boston suburb of Watertown .
Shortly after the Federal Bureau of Investigation declared them suspects in the bombings and released images of them , the Tsarnaev brothers killed an MIT police officer , carjacked an SUV . They soon engaged in a shootout with the police in the Boston suburb of Watertown .