Shelter-in-place order issued for Americans in Mexico after cartel leader killed Fox News correspondent Lucas Tomlinson reports on the aftermath of a military operation Sunday morning that killed major Mexican drug lord ‘El Mencho’ on ‘Fox Report.’ NEW You can now listen to Fox News articles! Following an operation that killed the leader of the Jalisco New Generation cartel, Nemesio Rubén Oseguera Cervantes, "El Mencho," a revolt broke out in Mexico by cartel members — causing chaos across