The Senate Health, Education, Labor and Pensions Committed released a scathing report on Thursday laying blame for the tragedy also on the Mine Safety and Health Administration for missing "significant flaws" in engineering analysis of the mine and ignoring several red flags, including an earlier cave-in that the report says should have been more thoroughly probed.
Sen. Edward M. Kennedy, D-Mass., says the report shows a need for a full, criminal investigation by the Department of Justice.
"The committee's investigation has revealed that the owner of Crandall Canyon mine, Murray Energy, disregarded dangerous conditions at the mine, failed to tell federal regulators about these dangers, conducted unauthorized mining and -- as a result -- exposed its miners to serious risks," Kennedy said in a statement. "MSHA also unconscionably failed to protect miners by hastily rubber-stamping the plan. This is a clear case of callous disregard for the law and for safety standards, and hardworking miners lost their lives."
Read the report here (PDF).