Who's to Blame for 2010 Upper Big Branch Mining Disaster?

29 miners died in the above disaster.  Massey Energy (now owned by Alpha Natural Resources) was the owner of the mine.  Alpha settled with the Justice Department, for $209 million in fines and restitution, to avoid prosecution for the disaster.  The criminal investigation of top officials of Massey Energy must continue as they systematically, intentionally and aggressively worked to avoid safety compliance and to thwart regulators.  If Massey had complied with mining regulations in the first place not one miner would have died!  Lies were told and records were destroyed.  More than a dozen of Massey's highest officers have all taken the 5th!  Why?  They should all be held accountable (and they should make themselves accountable).  Are these executives not embarrassed?  Are they not humbled?  How can they live with themselves?  They and their behavior are corrupt.  Corporate America at its finest once again.  These executives have paid fines with the corporate checkbook, with shareholder's money.