A victim admitted he was mistaken about a murder defendant’s location during a mass shooting after viewing surveillance footage during a trial before DC Superior Court Judge Rainey Brandt on May 14. Cotey Wynn, 45, is charged with first-degree premeditated murder while armed, three counts of assault with intent to kill while armed, and four counts of possession of a firearm during a crime of violence. The charges stem from his alleged involveme…