With all of the rumors, it would probably be wise for someone to make a statement. Right now, people are in shock. Give it another day or two, human nature will take over and the stories will start snowballing.
If the rumor regarding his working with the Feds were true, a death would not be staged for witness protection placement. He would simply disappear.
If an explosion took place, the news would have picked it up. Weird though that he said he was going on vacation and apparently the explosion took place in his own home. There was an explosion near Asheville, which is where Sporsgirl lives, but the home was vacant No stories of a home or car explosion in VB.