Boy , 4 , is found dead in a luxury apartment building in New York City . He had cuts , burns and visible bruising , authorities say . The cause of death was ruled to be suicide by carbon monoxide poisoning.
Boy , 4 , is found dead in a luxury apartment building in New York City . He had cuts , burns and visible bruising , authorities say . His baby sitter , 28 , has been arrested , but she has not been charged , police say .