The stars of Chicago P.D. have no trouble being cops on TV. But how do they perform when their knowledge about Chicago's craziest real-life laws is put to the test?

During a recent set visit, gave cast members Sophia Bush, Jesse Lee Soffer, Patrick John Flueger, Jason Beghe and LaRoyce Hawkins a "True or False" quiz about the most bizarre laws on the books in the Windy City - like whether or not it's illegal for police to use slingshots, and what commonality might get you arrested for being a vagrant.

Check out how they did in the video above.