Mark David Chapman might be innocent in the murder of John Lennon, according to a British author and TV producer who said his upcoming documentary and book outline how a second shooter might have killed the iconic singer. Chapman may have been brainwashed by the CIA to serve as a patsy, according to David Whelan, who spent three years investigating what he called astonishing inconsistencies in the official narrative of Lennon’s 1980 slaying as well as weird coincidences. Whelan, whose book “Gimme Some Truth – The Assassination of John Lennon” and a documentary will be released later this year, told...