SCRANTON, Pa. — A state police trooper seriously wounded in a 2014 ambush a near a rural barracks in eastern Pennsylvania has put the alleged gunman and his parents on notice that he plans to sue them.

The (Scranton) Times-Tribune reports ( court documents were recently filed on behalf of Trooper Alex Douglass against Eric Frein and his parents, Eugene and Deborah Frein.

Scranton attorney Vincent Cimini filed a writ of summons on behalf of Douglass in Monroe County Court last month, notifying the Freins a lawsuit will be filed.

Eric Frein is charged with fatally shooting Cpl. Bryon Dickson II and wounding Douglass outside the Blooming Grove barracks.

He led police on a 48-day manhunt before U.S. marshals caught him. He’s pleaded not guilty.

Information from: The Times-Tribune,