A key witness in ex-cop Amber Guyger’s murder trial, Joshua Brown was shot to death in Dallas
Witness in ex-cop Amber Guyger’s murder trial, Joshua Brown was shot to death in Dallas By Amir Vera, Hollie Silverman, Holly Yan and Ashley Killough, Courtesy of CNN Updated 5:31 PM ET, Sun October 6, 2019 (CNN)Ten days after he testified in the murder trial of a former Dallas police officer, key witness Joshua Brown was …