Engineer in Fatal NJ Transit Crash Had Undiagnosed Sleep Apnea: Sources

Three sources with knowledge of the briefing confirmed to ABC News that the engineer, Thomas Gallagher, had undiagnosed sleep apnea that was only discovered after the crash.
0:26 | 11/17/16

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Transcript for Engineer in Fatal NJ Transit Crash Had Undiagnosed Sleep Apnea: Sources
Sleep apnea is now being eyed as the cause of the fatal commuter train track train crash that is in September. One person died when the train plowed into the train terminal in Hoboken, New Jersey just across from Manhattan. Officials now say the engineer was died closed diagnosed with sneak sleep apnea after the crash. People with sleep apnea are a weekend at night as they're breathing stops which can lead to drowsiness during the day engineer has told investigators he had no memory of the crash.

This transcript has been automatically generated and may not be 100% accurate.

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