FERGUSON, MO - AUGUST 15:   In this handout image provided by the Ferguson Police Dept. the Ferguson Police claim these still images created from surveillance video show Michael Brown involved in a robbery shortly before he was shot and killed on August 15, 2014 in Ferguson, Missouri. Police said today that Brown was killed on August 9 by Ferguson police officer Darren Wilson, a six year veteran of the police department. Brown's killing sparked several days of violent protests in the city.  (Photo by Ferguson Police Dept via Getty Images)