The killing of Mike Brown in August 2014 made the world wake up to police gun use in America. But when the Guardian began looking for reliable data on how many civilians are killed by guns each year they found there was none.
For more indepth information read this.
Please note this video was released on December 22nd 2015, when the numbero of people killed stood at 1,126. By December 31st that number had risen to at least 1,134.