The former chief of historic Riverside Hospital - along with his son and two other persons affiliated with the facility - were convicted in federal court on Monday for their alleged roles in a Medicare scheme to steal $158 million in taxpayer money from the U.S. government. The move came after the state's top health official took the unusual move of traveling to Houston to tour the organization's three campuses for a first-hand look at problems from fire alarms and air conditioning to patient records and food-preparation conditions.