An anonymous reader writes "Oilfield services giant Halliburton will plead guilty to destroying computer test results that had been sought as evidence in the Deepwater Horizon disaster, the Justice Department announced Thursday. Company officials threw out test results that showed 'little difference' between the number of devices Halliburton said was needed to center the cement casing in the well at the heart of the disaster and the number well owner BP installed, according to court papers. The issue has been key point of contention between the two companies in hearings and litigation ever since the April 2010 blowout. BP and Halliburton are still battling over responsibility for the disaster in a New Orleans federal courtroom. BP had no comment on the plea agreement Thursday evening."