PORTLAND — Teams from Cape Elizabeth High School and Hampden Academy face off Thursday in the final round of the Maine High School Mock Trial Competition.

The teams will compete for the championship in the Maine Supreme Judicial Courtroom at the Cumberland County Courthouse. Maine Supreme Judicial Court Justice Jon Levy will be the presiding judge. U.S. Attorney Thomas Delahanty and Maine Law School Dean Peter Pitegoff will serve as evaluators.

The competition case involves the prosecution of the leader of an environmental activist group who is accused of murdering a paper company executive.

The competition has been sponsored for 18 years by the Maine State Bar Association, with support provided from the Maine Bar Foundation and Friends of Mock Trial.

Twenty high school teams – or approximately 300 to 350 students – participated in this year’s competition.