I do believe it may be used either way (now due to my arguements with somone who may not wish their name let out). Anyway as I read this I may see that everyones findings are from old uses. I believe the correct usage of hanged has changed into hung. Thusly because the value of human life is mostly viewed lower than it should these days. Hung is correct in my belief but if I were correcting a paper I would not count hanged as wrong(anymore).