PHILADELPHIA -- An Amtrak engineer involved in aturned himself in to police Thursday on charges including causing a catastrophe and involuntary manslaughter.
Brandon Bostian, 34, was handcuffed and placed under arrest Thursday morning, CBS Philadelphia reports.
Just minutes after leaving Philadelphia on May 12, 2015, on a Washington-to-New York run, the train accelerated to 106 mph on a 50 mph curve, derailing in a crash that killed eight people and injured about 200.
The National Transportation Safety Board found that Bostian essentially forgot where he was when he sped up.
Bostian, who has been on unpaid administrative leave from Amtrak, did not respond to reporters' questions as he entered the police station.
Philadelphia prosecutors, but a judge acting on a private criminal complaint from a crash victim's family .
The case was referred to the state attorney general, who added a felony count of causing a catastrophe on top of eight misdemeanor counts of involuntary manslaughter and other charges.
The citizen complaint against Bostian was brought by attorneys for the family of Rachel Jacobs, a 39-year-old chief executive of a Philadelphia-based technology startup who was killed returning home to her husband and 2-year-old son in New York.
Just days before a two-year statute of limitations was to expire, Philadelphia prosecutors announced they had concluded there was insufficient evidence to prove that Bostian acted with intent or "conscious disregard" for the passengers' safety.
But victim lawyers said that should be an issue for a jury to decide.
Amtrak has taken responsibility for the crash andto settle claims filed by victims and their families.
The NTSBthat Bostian was impaired or using a cellphone. The agency also called Amtrak's long failure to implement automatic speed control throughout the busy Northeast Corridor a contributing factor.
Bostian has a, saying he was left disoriented or unconscious when something struck his train before it derailed. He had heard through radio traffic that a nearby commuter train had been struck by a rock. However, the NTSB concluded that nothing struck his locomotive.
"The best we could come up with was that he was distracted from this radio conversation about the damaged train and forgot where he was," NTSB chairman Christopher Hart said at a May 2016 hearing.