A high-ranking kingpin and so-called Narco Prince was sentenced to life in prison by a federal judge on Friday in Washington, D.C., in one of the first drug war trials to conclude since the Trump administration declared certain Mexican cartels to be “terrorist” organizations.

Rubén Oseguera-Gonzalez is the U.S.-born son of Nemesio Oseguera Cervantes, who founded the Jalisco New Generation Cartel, or CJNG, and is Mexico’s most wanted man. While his father, alias “El Mencho,” is still at large, Oseguera, alias “El Menchito,” was convicted by a U.S. jury in September of conspiring to traffic cocaine and meth, and possessing weapons to further his drug trafficking operations.