CNN CNN Newsroom With Brooke Baldwin May 18, 2015 18:37:00
Waiting to hear from the ntsb on that. we understand that they've called in the fbi to take a look at what they say is a fist-sized circular mark on the left-hand side of the windshield. they think it was there before the crash, but they don't know what caused it. they don't know how it got there. so they're leaning on the fbi for that forensic expertise. at the same time it appears they're beginning to discount or doubt the account of an assistant conductor that was on amtrak 188 that night. she told investigators she thought she heard the 32-year-old conductor brandon bostian tell the bostia...