A former employee is accusing the oil giant BP of firing him for refusing to alter data about the cleanup of the 2010 Gulf Coast oil spill. In a lawsuit filed in Louisiana, August Walter says he was subjected to “a malicious campaign” after voicing concerns that BP was defying the cleanup requirement mandated by government officials. Walter says a BP executive informed him of “people watching him” to ensure he would not interfere with BP’s plans. According to Walter, BP officials hid data from the U.S. Coast Guard to avoid having to clean up certain areas. Walter was fired from BP last month. He is seeking compensation under the Louisiana Environmental Whistleblower Statute.