Rick Leventhal brought us the latest details this morning on the Amtrak train derailment, including new information on the engineer who was at the controls.

He said Brandon Bostian, 32, has been identified as the engineer and that he is no longer talking to authorities about the crash. 

Bostian obtained a lawyer and the probe is now focused on what he was doing before the derailment, which killed eight people.

His attorney told ABC News that Bostian suffered a concussion in the accident and doesn't remember what happened. 

The attorney said Bostian, a Queens, New York resident, had "no explanation" for how the crash occurred.

Bostian was treated at a hospital and released on Tuesday night. His attorney said he spent at least five hours talking to police.

The NTSB has said the train was speeding at over 100 mph as it headed into the curve where the crash took place. 

The speed limit on that stretch of track is 50 mph. Authorities said the emergency brake was used in the moments before the derailment. 

Bostian has turned over his phone to authorities. The attorney said Bostian wasn't using it at the time of the crash and that drugs or alcohol were not a factor.

Bostian's LinkedIn profile states that he's been working for Amtrak for nine years and as a passenger engineer since Dec. 2010.