The “official” PID story: Paul was killed in a car crash November 9, 1966 and was replaced by look-alike William Campbell. This rumor first began in October 1969, when clues allegedly planted by the Beatles themselves began to be uncovered. In October 1969, a Detroit disc jockey, Russ Gibb, received a call from a listener (“Tom”) insisting McCartney was dead and suggesting he play the Beatles’ song ”Revolution Nine” backwards. Gibb did, and heard “turn me on dead man, turn me on dead man.”

In an article in the August 2009 Italian issue of WIRED magazine, two forensic scientists conducted a biometrical analysis of Paul pre & post 1966. They actually set out to prove PID was a hoax, but they actually ended up proving Paul was replaced.

In 2009, two Italians, Francesco Gavazzeni (IT analyst) and Carlesi Gabriella (medico-legal), studied images of Paul McCartney taken before and after the alleged death, and claimed there is high probability that it is not the same person, based on analysis of the shape of the skull and jaw, the curve of the jaw, the ear, palate and teeth.