McCastle v. Rollins is a case that was filed on behalf of the residents of Alsen (a small community located in East Baton Rouge Parish), Louisiana against Rollins Environmental Services, Inc., and (a toxic waste cleaning company). Although the decision in this case allowed the plaintiffs within this community to be certified as a class, and allowed them to be viewed as a unit when filing their lawsuit, and thereby reversing the decision that had been made at the trial and appellate level, the case was not reheard in the lower courts. Instead, Rollins Environmental Services, Inc. settled with the plaintiffs outside of court in 1987.Although this case is primarily cited for what a group of people need to do in order to obtain class certification, it is also often cited as one of the pivotal