Jeffrey John `` Jeff '' Hanneman ( January 31 , 1964 -- May 2 , 2013 ) was an American musician , best known as a founding member of the American thrash metal band Slayer .
Jeffery John `` Jeff '' Hanneman ( January 31 , 1964 - May 2 , 2013 ) was an American musician . He was most famous for being one of the founding members of the thrash metal band Slayer .