Metro Transit Police (MTPD) in Washington, DC launched an investigation after an officer used a stun gun on an unarmed Black man. The incident occurred on June 22 around 5:42 p.m. at the U Street Metro Station after authorities received a report of juveniles threatening riders with sticks. Video of the incident shows the man, identified as 28-year-old Tapiwa Musonza, asking officers questions before the incident escalated quickly, WUSA9...