A former manager at US energy services giant Halliburton who admitted destroying evidence in an inquiry into the largest oil spill in US history has been sentenced to a year's probation…The disaster was caused by an explosion at BP's Deepwater Horizon rig, which killed 11 people. Badalamenti was the cementing technology director for Halliburton, which had been hired to provide cementing services to BP on the Macondo oil well…Separately, Halliburton has pleaded guilty to the unauthorised deletion of data. The contractor is the third of three major companies at the heart of the huge oil spill to admit criminal wrongdoing. BP and rig operator Transocean have already pleaded guilty to charges related to the disaster.