that we believe were on amtrak train number 188 from tuesday night. >> reporter: also today, we learned more about the engineer at the center of the investigation. 32-year-old brandon bostian was an amtrak conductor before becoming an engineer in 2010. today his attorney told "good morning america" bostian was injured and doesn't remember the crash, had not been drinking or doing drugs, and his cell phone was turned off and in his bag, as required by amtrak policy. >> the last thing he recalls is coming to, looking for his bag, getting his cell phone, turning it on and calling 911. >> reporter: the speed limit on the tracks leading up to the curve at frankford junk is posted at 80 miles per hour slowing to 50 in the curve. but train 188 was traveling 106 miles per hour when the engineer slammed on the brakes. it was too late. the train actually went off the tracks right down there around the bend. it then careened all the way down the right-of-way. and in the process, it took out four of these