HOBOKEN, N.J. — National Transportation Safety Board investigators have interviewed accident train engineer 48-year-old Thomas Gallagher, a father of two girls who has worked for the railroad for 29 years.
Drug and alcohol tests were administered but the results won't be known for a few weeks.
"We will be here seven to ten days, or however long it takes," NTSB Vice Char Bella Dinh-Zarr said.
Among the NTSB's other developments: videos from other trains have been examined, no signal anomalies were found on the track, the cab's event recorder and camera are still inaccessible and no problems were found after a walking inspection of the tracks.
The one event recorder recovered has been sent back to the manufacturer in Kentucky for downloading.
Published reports say the Federal Railroad Administration began investigating safety problems at NJ transit before last Thursday's fatal crash.
An audit began in June, according to the report, after an increase in safety violations and what was called a "leadership vacuum" at the top of the railroad.
Once the audit was completed, the federal agency reportedly issued a series of violations.