A union rep has confirmed that the engineer of the Metro-North train that crashed in the Bronx on Sunday, killing four and injuring scores more, "was nodding off and caught himself too late." Alcohol tests came back negative.

Depending on your source, the engineer of the Metro-North train that crashed Sunday, killing four and injuring more than 60, was either "zoned out" or dozing just seconds before the derailment. The engineer, William Rockefeller, reportedly woke up as the train—then traveling 82 mph—entered a 30-mph bend in the Bronx.