The Guardian newspaper has revealed new details about how a British police officer spent seven years infiltrating the highest levels of the environmental protest movement in Britain and around Europe. The officer, Mark Kennedy, reportedly “took part in almost every major environmental protest in the U.K. from 2003,” and his involvement ran so deep that he is now being accused of crossing the line from undercover cop to agent provocateur. In 2009, Kennedy’s cover was blown when activists found his passport. Kennedy is now offering to help activists he once spied on, including activists who were charged with conspiring to shut down a coal-fired power station in 2009. Once Kennedy began assisting their defense team, prosecutors dropped the charges.