I understand that. But it seems like a big gamble. Lamb of God is just a band after all. I would have to research the legal system of Czech Republic more to judge the choice closer, all I really know about the country is they brew Pilsner lol.
And also Budweiser, the original one... ;) :D
While the justice system here is not perfect (it's extremely slow in the first place), I doubt he will be found guilty. He'll likely pay some compensation to the family (which he is willing to do anyway), but that's all... The general consensus here is, that it wasn't his fault (which obviously wasn't), but the dead guy's and organiser's fault.