the tapes, to which the investigators had listened. The most prominent Monroe conspiracy theorist in the 1980s was British journalist Anthony Summers, who claimed that Monroe's death was an accidental overdose enabled and covered up by Robert F. Kennedy. His book, Goddess: The Secret Lives of Marilyn Monroe (1985), became one of the most commercially successful Monroe biographies. Prior to writing on Monroe, he had authored a book on a conspiracy theory of the assassination of John F. Kennedy. His investigation on Monroe began as an assignment for the British tabloid the Sunday Express to cover the Los Angeles District Attorney's 1982 review. According to Summers, Monroe had severe substance abuse problems and was psychotic in the last months of her life. He alleges that Monroe had affairs with both John and Robert Kennedy, and that when Robert ended their affair she threatened to reveal their association. Kennedy and Peter Lawford attempted to prevent this by enabling her addictions. According to Summers, Monroe became hysterical and accidentally overdosed, dying in an ambulance on the way to the hospital. Kennedy wanted to leave Los Angeles before Monroe's death became public to avoid being associated with it, and therefore her body was returned to Helena Drive and the overdose staged as a suicide by Lawford, the Kennedys and J. Edgar Hoover. Summers based his account on interviews he had conducted with 650 people connected to Monroe, but his research has been criticized by biographers Donald Spoto and Sarah Churchwell. According to Spoto, Summers contradicts himself, presents false information as fact, and misrepresents what some of Monroe's friends said about her. Churchwell, meanwhile, has stated that while Summers accumulated a large collection of anecdotal material, most of his allegations are speculation; many of the people he interviewed could provide only second- or third-hand accounts, and they "relate what they believe, not what they demonstrably know". Summers was also the first major biographer to find Slatzer a credible witness, and relies heavily on testimonies by other controversial witnesses, including Jack Clemmons and Jeanne Carmen, a model-actress whose claim to have been Monroe's close friend has been disputed by Spoto and Lois Banner. Summers' allegations formed the basis for the BBC documentary Marilyn: Say Goodbye to the President (1985), and for a 26-minute segment produced for ABC's 20/20. The 20/20 segment was never aired, as ABC President Roone Arledge decided that the claims made in