VIDEO: Key witness in Amber Guyger trial shot to death

10/7/2019 10:47 AM   

A key witness in the murder trial of a former Dallas police officer is now dead, and police are trying to find out who killed him. Joshua Brown, Botham Jean's neighbor, was shot to death on Friday. His testimony helped prosecutors piece together the events of Jean's murder, and ultimately led to Amber Guyger's conviction.