(Seattle, WA)  --  Authorities are releasing the identity of the third person killed in Monday's Amtrak train derailment.  The Pierce County Medical Examiner says 40-year-old Auburn resident Benjamin Gran was on-board the Portland-bound Amtrak train when it derailed and crashed down onto the southbound lanes of I-5 below.  Gran's mother Linda Daniels tells the Seattle Times that Gran was a passionate fan of trains.  Daniels called her son "awesomely autistic" and "an Amtrak fan to the max."  Thirty-five-year-old Zack Willhoite and 61-year-old Jim Hamre also died in the crash.