The Federal Bureau of Investigation investigated the complaint, and looked into the various rumors of "real lyrics" that were circulating among teenagers. In June 1965, the FBI laboratory obtained a copy of the Kingsmen recording and, after 31 months of investigation, concluded that it could not be interpreted, that it was "unintelligible at any speed," and therefore the Bureau could not find that the recording was obscene. In September 1965, an FBI agent interviewed one member of the Kingsmen, who denied that there was any obscenity in the song. The FBI never interviewed songwriter Richard Berry nor consulted the actual lyrics that were on file with the U.S. Copyright Office.