The former security chief for Massey Energy’s Upper Big Branch mine in West Virginia has been sentenced to three years in prison for his role in covering up the 2010 mining disaster that killed 29 workers. Hughie Stover was convicted of making false statements to FBI and Mine Safety and Health Administration investigators and of obstructing a federal probe. Stover is the first mine official to be sentenced in what is expected to be a number of cases related to the Upper Big Branch tragedy.