It looks like Amtrak needs new rules of engagement:

The attack occurred as the train from the Bay Area neared the I Street Bridge to Sacramento’s rail station and slowed for a signal, said Eugene Skoropowski, managing director of the Capitol Corridor, said. A group of people stood on the tracks to block the train, which stopped. When the engineer went downstairs and opened the door, he was dragged off the train and assaulted, Skoropowski said.

It wouldn’t hurt to let the engineers have firearms, either, if they’re trained.