Mexico has handed over Néstor Isidro Pérez Salas, the security chief of the Sinaloa cartel led by the notorious "El Chapo," to U.S. authorities. In a speech delivered to celebrate the cooperation between the United States and Mexico in this case, U.S. President Joe Biden praised the handover of "El Nini," calling it "a good day for justice." Biden previously referred to him as one of the most wanted criminals in America, facing charges of conspiracy to smuggle cocaine and methamphetamine, possession of automatic weapons, and witness retaliation in February 2021. According to the U.S. Department of Justice, the 31-year-old Nini was one of the main hired killers in the Sinaloa cartel and was involved in the production and sale of fentanyl in the United States. The U.S. State Department offered a reward of up to $3 million for information leading to his arrest, and he was apprehended in Mexico last November. According to the State Department, Pérez Salas worked directly with Óscar Noy Medina González, one of the associates of Iván Archivaldo Guzmán Salazar, one of Joaquín "El Chapo" Guzmán's sons, who was sentenced to prison in the United States in 2019.