 Alexi Saenz entered the plea Wednesday in federal court. The teen's deaths focused the nation's attention on MS-13 violence during the Trump administration. For months, Hispanic children and young men had been disappearing in Brentwood. After the teen girls were killed, police discovered more bodies of young people. Charges are still pending against Saenz's brother. Prosecutors say he was second in command in the local gang. Julie Walker, New York.