A woman’s ex-boyfriend has been charged with first-degree murder in the killing of her mother in Maryland 23 years ago, authorities said.

Eugene Teodor Gligor, 44, was arrested on June 18 by U.S. marshals in Washington, D.C., in connection with the May 2, 2001, killing of Leslie Preer, 49, at her Chevy Chase home, the Montgomery County Police Department announced.