Who is responsible for the nation-wide brutality against peaceful protesters?

Police Executive Research Forum (PERF) whose Executive Director, Chuck Wexler, also serves on the Department of Homeland Security's 'Advisory Council.'

"The White House says there’s no federal oversight... But a little-known but influential private membership based organization has placed itself at the center of advising and coordinating the crackdown on the encampments. The Police Executive Research Forum, an international non-governmental organization with ties to law enforcement and the U.S. Department of Homeland Security, has been coordinating conference calls with major metropolitan mayors and police chiefs to advise them on policing matters and discuss response to the Occupy movement. The group has distributed a recently published guide on policing political events." - San Francisco Bay Guardian Article

Anonymous has uncovered corporate sponsor: Motorola ties to PERF
PERF - Official Website