In March 2015, "The Independent" reported that Powell was one of the MPs whose activities had been investigated as part of Operation Fernbridge. His name had been passed to police by Paul Butler, the Bishop of Durham, after allegations of Powell's involvement in historic child abuse had been made by one individual in the 1980s to the then Bishop of Monmouth, Dominic Walker. Simon Heffer, who has published a biography of Powell, has described the allegation as a "monstrous lie" and criticised the Church of England's actions in "putting this smear into the public domain", while the church stated that it had simply responded to an inquiry from the press and confirmed that allegations about Powell, which related to an alleged satanic cult rather than any criminal activity, had been passed to the police. David Aaronovitch of "The Times" wrote in April 2015 that the 1980s claims about Powell originated from fabricated claims invented by a conman, Derry Mainwaring Knight, whose false assertions had become known to the clergy, but had been unwittingly conveyed to the police in good faith.