Ackerman v. ExxonMobil Corp., No. 12-1103 (4th Cir. 2013)

This case concerned a class action filed against defendants for contamination of plaintiffs' properties by gasoline and a gasoline additive (the Koch action). Former Koch class members subsequently filed a new class action (the Ackerman action). On appeal, defendants challenged the district court's order abstaining from exercising jurisdiction under the Colorado River doctrine. The court held that 28 U.S.C. 1446(d) affected only the jurisdiction of the state court only with regard to the case actually removed to federal court; because Koch was not removed, the state court maintained jurisdiction over it, and the amendment to the complaint in that case was not void ab initio; and the district court was correct to consider the amended Koch complaint in determining whether the Koch and Ackerman actions were parallel, and the district court did not abuse its discretion when concluding that exceptional circumstances warranted abstention in favor of the pending Koch action. Accordingly, the court affirmed the district court's judgment.