The city of Rochester is busing in town “elders’’ to act as a “buffer’’ between protesters and cops Sunday night after a large violent clash there hours earlier over the police death of Daniel Prude, officials said. Rochester Police Chief La’Ron Singletary said at a press conference with the city’s mayor Sunday that local authorities have “credible information one of the areas [marchers] want to target is a symbolic feature’’ — the town’s public-safety building, which houses its police department. Mayor Lovely Warren said she and local pastor Myra Brown came up with a plan to have about 50 “elders’’ form a line of peaceful...