FERGUSON, MO - AUGUST 20:  Ferguson Police officer Greg Casem is overcome with emotion during a candlelight vigil held in honor of Jamyla Bolden on August 20, 2015 in Ferguson, Missouri. Casem carried Jamyla Bolden, 9, to an ambulance after she was allegedly struck by a stray bullet from a drive-by shooting and killed while doing her homework at her home in Ferguson on August 18th. (Photo by Michael B. Thomas/ Getty Images)