West Virginia's U.S. Attorney for the Southern District said Thursday the investigation into the worst mining disaster in 40 years isn't over.
Booth Goodwin said they are still following leads on what lead to the explosion at the Upper Big Branch mine.
Goodwin said that former mine Superintendent Gary May is expected to be sentenced in October, and that more charges could be brought against other people involved. "We want to bring any individuals responsible to justice. We also want to get to the bottom of just exactly what happened there. Those two goals are not mutually exclusive and I would anticipate we'll be prepared to make an announcement very soon," said Goodwin.
The first person charged in the investigation, Security Chief Hughie Stover, is appealing his sentence. Stover is facing three years in prison but is free while he appeals.