Engineer Thomas Gallagher, who was at the controls of the NJ Transit train that crashed at Hoboken on Sept. 29, recently was diagnosed with severe sleep apnea, according to his lawyer, Jack Arseneault. Mr. Gallagher has said he has no memory of the crash, in which his train unaccountably accelerated to more than twice the allowed speed within the station; brakes were applied only seconds before the train impacted the bumper block at the end of the track, crashed through it, and came to rest in a pedestrian area, killing a bystander. More than 100 were injured, mostly on the train. The new development was reported by Emma G. Fitzsimmons in the New York Times (Nov. 17). According to the National Institutes of Health, sleep apnea can cause daytime sleepiness. Mr. Gallagher's recollection is that he did everything he was supposed to do, "and the next thing he knew he was on the floor," according to Arseneault. NJ Transit, which cleared Gallagher for service after a physical exam in July, said it was not authorized to discuss employees' medical information, but that it had a sleep apnea screening program.  The disorder had been implicated in a crash on Metro-North Railroad in 2014. Lawyer Arsenault said that Gallagher is an "extremely heavy man" with a large neck circumference, adding "I believe common sense indicates that a man like that could be subject to suffering from adult sleep apnea."