Federal prosecutors secured the fourth guilty plea in a bribery scheme involving Michigan's former medical marijuana licensing board. Brian Pierce, 45, pleaded guilty to a conspiracy to commit bribery charge Friday in a federal courtroom in Grand Rapids. Pierce, along with Vincent Brown, 32, funneled $42,000 in bribes to former Michigan House Speaker Rick Johnson during … [Read more...] about 2nd lobbyist pleads guilty in medical marijuana corruption scheme