Working in a railroad yard or repair facility can pose risks and its unfortunate to hear of any loss of life. All that we can do is extend prayers and condolences to this persons family.
My metra train goes by that area every day at that time. There were 4 or 5 Chicago police cars driving rapidly around the Amtrak facility with their lights flashing so it might be a criminal matter rather than an accident. As of now there have been no updates.