MILWAUKEE, Wis. — Five Ohio police officers, on special duty at the Republican National Convention, fired shots at a man in a residential neighborhood. He fell dead to the ground. Authorities did not release the victim’s name immediately but said he was 43 and believed homeless. Body cams showed the man charging another person with a knife. This was near King Park, which has a longstanding homeless encampment. It’s a mile from the Fiserv Forum, where the convention is underway. The officers, from Columbus, Ohio, were part of a contingent of 4,500 officers in Milwaukee to help local authorities. They were comprised a uniformed bicycle patrol unit meeting to discuss their daily assignment. Body cams showed the officers running toward the man and shouting repeatedly at him to drop the knife. When he did not, they began firing.