You'll find the story here.
The basics play out like this: a fan jumped up on stage in Prague back in 2010. Randy and the guy got into a fight. The dude was injured. He apparently ended up dying from the injuries? When they landed for their show in Prague last night, Randy was arrested on the spot, and the band had to cancel their show.
Needless to say, this is kind of a shock. Any LoG fans that said "WTF" just like me?
*EDIT* So...umm....just saying, such is the rule of honor? Randy should be forgiven.