With police use of force increasingly under focus, Rener Gracie is teaching cops Brazilian jiu-jitsu as a way to apprehend suspects using the least possible violence – a method proving effective for the Marietta PD. #HBO​ #RealSports​ Subscribe to HBO on YouTube: goo.gl/wtFYd7​ Stream on HBO Max: itsh.bo/hbo-max Real Sports is TV's most honored sports journalism series, with 33 Sports Emmy Awards, including 19 for Outstanding Sports Journalism. Now in its 27th season, the monthly magazine broadcast produces unchartered investigative pieces and in-depth profiles from across the sports spectrum. Get More Real Sports with Bryant Gumbel Official Site: hbo.com/real-sports-with-bryant-gumbel Twitter: twitter.com/realsportshbo​ Facebook: facebook.com/realsportshbo​ Get More HBO Official Site: itsh.bo/dotcom​ Twitter: twitter.com/hbo​ Instagram: instagram.com/hbo​ Facebook: facebook.com/hbo Real Sport...