Going through the latest Virtual Railfan video... Southwest Chief 4(31) hauling LA Metrolink coaches?!? And that's before the sleepers. What happened there? Amtrak borrow some coaches?
Mr. Wolf, I have observed same myself, although not the observation you noted recorded by Virtual Railfan. For that, I'd need be trackside for whenever #4(31) makes the scene today.
Possibly Beech Grove landed a contract to overhaul those LACMTA cars (or whatever that agency is now known as).