Hanged -v- Hung.

I was reading about Jolly Roger's on wikipedia, and came across an entry for one "Christopher Moody." The first paragraph states that he was "hanged," and when I read it I couldn't help but wonder if the person should have used hung instead of hanged. (here's the page: http://en.wikipedia.org/wiki/Christopher_Moody )

SP, which would be the proper word to use in that instance, or does it really not matter?