There is a new development in the case of the police killing of 68-year-old Kenneth Chamberlain Sr., the former Marine who was killed in his own home in White Plains, New York, after he accidentally triggered his life alert pendant. Attorneys for the Chamberlain family have identified the White Plains police officer who shouted a racial slur at Chamberlain prior to the fatal shooting. Attorneys said the officer, Steven Hart, is also named in an unrelated civil lawsuit alleging police brutality brought by a defendant who said he was slammed down to the ground during an arrest 15 months ago.