The Brief A mayoral candidate for Detroit is facing backlash over free concert tickets. A recent post on Detroit City Council President Mary Sheffield’s Instagram shows a shout-out from hip-hop artist Jeezy during a performance. The front-runner in Detroit's mayoral race is facing some tough scrutiny over whether she received free concert tickets. FOX 2 has learned that the city's ethics board will investigate whether Council President Mary Sheffield did anything wrong. On Monday, a Detroit Free Press article reported that the Detroit mayoral candidate could face an ethics investigation for receiving tickets to that same concert.