Something — it is not clear whether it is the stun gun — is either tossed or knocked to the ground behind the two men, and Officer Slager draws his gun, the video shows. When the officer fires, Mr. Scott appears to be 15 to 20 feet away and fleeing. He falls after the last of eight shots.
The officer then runs back toward where the initial scuffle occurred and picks something up off the ground. Moments later, he drops an object near Mr. Scott’s body
via South Carolina Officer Is Charged With Murder of Walter Scott – NYTimes.com.