If I was that engineer, I would be on suicide watch. How can you leave a train like that without doing everything by the book?
Honestly, how can you leave a train like that unattended at all? It’s a fundamental failure to ever leave a train unattended.
Much more detailed information found here: http://www.reuters.com/article/2013/07/11/us-train-brakes-insight-idUSBRE96A03I20130711
Engineer claims he set 11 brakes, but his company doubts he set that many.
From the article: “At least three independent railroad industry experts contacted by Reuters said they would have opted to apply at least 20 brakes and as many as 30 on a similar heavy train parked at a grade of 1.2 percent, which is the slope of the track where the runaway train had been parked.”