it's true that the vocalist of the band died?

Yea, their old singer died. Actually a local band from my area was kinda following Ozzfest around the year Drowning Pool was on it, giving out free demos and shit, and they made friends with Drowning Pool. To my understanding they were a great bunch of guys, real friendly and down to earth. Shame about their singer. Don't know anything about the new singer though, sorry.