In April 2012, the Justice Department filed the first criminal charge against Kurt Mix, a BP engineer, for obstructing justice by deleting messages showing that BP knew the flow rate was three times higher than initial claims by the company, and knew that "Top Kill" was unlikely to succeed, but claimed otherwise.[363][364][365] Three more BP employees were charged in November 2012. Site managers Donald Vidrine and Robert Kaluza were charged with manslaughter for acting negligently in their supervision of key safety tests performed on the rig prior to the explosion, and failure to alert onshore engineers of problems in the drilling operation.[366] David Rainey, BP's former vice-president for exploration in the Gulf of Mexico, was charged with obstructing Congress by misrepresenting the rate that oil was flowing out of the well.[367] Lastly, Anthony Badalamenti, a Halliburton manager, was charged with instructing two employees to delete data related to Halliburton's cementing job on the oil well.[368]