A disgraced celebrity chef was convicted of slaughtering his wife and two young kids on Christmas Day — nearly eight years after posting a cheerful caroling video with his son the night before the killing spree . Anthony Milan Ross, 53, was found guilty Monday by a Maricopa County jury on three counts of first-degree murder for the killings of his estranged wife, Iris, and their two young children, 11-year-old Nigel and 10-month-old Anora, AZ Family reported. Ross, a local TV vegan chef and