Federal prosecutors have announced they will investigate last year’s fatal police shooting of Kenneth Chamberlain Sr., the 68-year-old African-American former Marine who was shot dead inside his own apartment in White Plains, New York, after he accidentally set off his LifeAid medical alert. Last week, a Westchester grand jury declined to bring charges against any of the police officers involved in the incident. He was shot by a white police officer. Shortly before the shooting, another police officer referred to him using the “N-word.” Ellen Davis, a spokesperson for the U.S. Attorney’s Office for the Southern District of New York, said, “We will review all of the available evidence with respect to the death of Kenneth Chamberlain, including the evidence collected during the state’s investigation, to determine whether there were any violations of the federal criminal civil rights laws.”