As expected, Chevron Corp. has decided to pursue fraud claims against Patton Boggs, the largest law firm to represent the plaintiffs who won a $19 billion environmental pollution judgment against the oil company in Ecuador.

In a motion filed on May 10, Chevron alleges that Patton Boggs tried to cover up evidence that the judgment, issued by an Ecuadorian court in 2011, was the product of bribery and ghostwriting on the part of other lawyers for the plaintiffs.