PHILADELPHIA — The lawyer for Brandon Bostian, the engineer at the helm of the Amtrak train that derailed on Tuesday that killed seven, said Bostian suffered a concussion during the accident and has “absolutely no recollection of the incident,” according to several sources, including NBC10.

Video: NTSB B-roll of scene of Amtrak train #188 derailment in Philadelphia

Aside from a concussion, Bostian also required 14 staples in his head, as well as several stitches in his leg. He was released from the hospital and interviewed by police Wednesday.

National Transportation Safety Board (NTSB) investigators say the train was traveling at 106 miles per hour along a sharp curve where the speed limit is 50 mph. They also say Bostian slammed on the emergency brake moments before the train hurled off the tracks.

When Bostian applied the emergency brakes, he managed to slow the train only to 102 mph by the time the locomotive's black box stopped recording data, said NTSB's Robert Sumwalt. The speed limit just before the curve is 80 mph, he said. For the full story, click here.