A former Massachusetts State Police commander has been sentenced to six years in federal prison for orchestrating a bizarre and brazen bribery scheme that traded commercial driver’s licenses for everything from snowblowers and driveways to candy and bottled water — a scandal prosecutors called one of the “oddest and greediest” cases of public corruption in state history. Gary Cederquist, 60, of Stoughton, who once led the Commercial Driver’s License (CDL) Unit, was convicted in May on 48 federal counts, including extortion, mail fraud, falsifying records, and honest services fraud. Prosecutors said the former trooper granted passing road test scores to...