The brake pressure went to zero five seconds prior to a full stop of the locomotive. The NTSB official did not say the reason the train entered the curve at such a high speed.
Sen. Chuck Schumer (D-NY) said it was premature to assign blame for the incident.
"When I heard about the speed, I gulped," he said in a press conference. "It sort of took my breath away. The fact that it was going 82 miles per hour...raises so many questions and is scary."