Driver missing after train crash, lawmakers at US-Mexico border, tracking SoCal snow; The Rundown

An investigation is underway after a Metrolink train collided with a pick-up truck whose driver was not found after the crash. Also, federal lawmakers visited the US-Mexico border in Texas today ahead of Congress returning to work next week. Plus, we are tracking additional potential snowfall coming to Southern California this week, which is good news for local mountain resorts! Your top stories at the top of the hour, weekdays at 2p, 3p, and 7p streaming on CBS News Los Angeles.