The song “Louie Louie,” was an obsession of the FBI’s in the 1960s.
In trying to determine whether the song violated the Federal Interstate Transportation Obscene Matter statues, the FBI spent two years analyzing the song and lyrics, resulting in a 455-page obscenity investigation.
The singer and songwriter, Jack Ely died Tuesday at the age of 71, WTOP.com reports. 
Ely’s son told WTOP that his father got “quite a kick” out of the lengthy investigation, which helped make the song even more popular than it already was.
Check out the entire file here. http://vault.fbi.gov/louie-louie-the-song