In Occidental Permian Ltd. v. Helen Jones Foundation, et al., a group of Texas royalty owners alleged that OPL, an oil and gas producer, had underpaid royalties for casinghead gas produced during carbon dioxide-injection tertiary recovery operations in West Texas. Hankinson LLP was hired to assist OPL during trial, post-trial, and appellate proceedings. After the jury reached a multi-million dollar verdict for the plaintiffs, OPL appealed. Deborah Hankinson argued the case before the Amarillo Court of Appeals, and the Amarillo Court of Appeals reversed the trial court’s judgment, concluding that no evidence supported the jury’s findings. The court of appeals rendered judgment that the plaintiffs take nothing against OPL. Occidental Permian Ltd. v. Helen Jones Foundation, et. al, 333 S.W.3d 392 (Tex. App.—Amarillo Jan. 31, 2011, pet. denied).