Video Of Amtrak Crash Shows The Moments Leading Up To The Deadly Derailment

Officials are currently looking into what caused Tuesday's Amtrak crash that killed at least eight people and injured another 200, and video from both inside and outside the train will likely serve as crucial evidence in officials' investigation. Footage from nearby surveillance cameras have surfaced in the days since the fatal derailment, and video of the Amtrak crash eerily show the moments right before the train careened off the tracks. Authorities said the Amtrak train was traveling more than 100 miles per hour, twice the speed limit for the curve where it derailed.

Surveillance video from a nearby building owned by Tow Decision Inc. shows the moment the train derailed, which sent a huge line of sparks flying into the air. Robert Sumwalt, the National Transportation Safety Board board member supervising the investigation, said Wednesday the train also had a front-facing camera whose footage would be examined as part of the investigation. It's all just another reminder of how critical cameras have become in understanding the sequence of events that lead up to a tragic incident.

The engineer driving the train, Brandon Bostian, has agreed to talk with investigators in the coming days, according to the Sumwalt. Bostian's attorney previously told ABC News his client had "absolutely no recollection whatsoever of the events." That's where footage from multiple cameras located around the crash site will help provide additional angles to what happened that night in Philadelphia.

Other video that surfaced Wednesday showed how calm and simple the night was when the train tragically derailed. Captured by a surveillance camera on a CSS International Corp. building, the video shows the Amtrak train near the top of the screen moving along the track normally for several seconds. A short moment later, a flash lights the sky and smoke fills the air.

The train's camera could yield the most critical pieces of evidence in understanding what led to the derailment. The train's exterior camera also captures sound, according to The Associated Press, which can help investigators hear the sound of the train's wheels on the track. So far, that camera has already helped investigators learn the train sped up in the final minute before the crash.