Investigators probe deadly Amtrak derailment in Montana


              Engines and cars from an Amtrak train that derailed a day earlier are shown Sunday, Sept. 26, 2021, at the derailment site just west of Joplin, Mont.. The crash killed three people and injured others. The westbound Empire Builder was en route to Seattle from Chicago, with two locomotives and 10 cars. (AP Photo/Ted S. Warren)
            
              Heavy equipment moves gravel Sunday, Sept. 26, 2021, next to cars from an Amtrak train that derailed the day before just west of Joplin, Mont., killing three people and injuring others. The westbound Empire Builder was en route to Seattle from Chicago, with two locomotives and 10 cars. (AP Photo/Ted S. Warren)
            
              A worker walks Sunday, Sept. 26, 2021, next to a car from an Amtrak train that derailed Saturday just west of Joplin, Mont. The westbound Empire Builder was en route to Seattle from Chicago, with two locomotives and 10 cars. (AP Photo/Ted S. Warren)
            
              Workers walk near derailed cars from an Amtrak train, Sunday, Sept. 26, 2021, that derailed the day before just west of Joplin, Mont., killing three people and injuring others. The westbound Empire Builder was en route to Seattle from Chicago, with two locomotives and 10 cars. (AP Photo/Ted S. Warren)
            
              Engines and cars from an Amtrak train that derailed a day earlier are shown Sunday, Sept. 26, 2021, at the derailment site just west of Joplin, Mont. The crash killed three people and injured others. The westbound Empire Builder was en route to Seattle from Chicago, with two locomotives and 10 cars. (AP Photo/Ted S. Warren)
            
              A sign is shown at a railroad crossing, Sunday, Sept. 26, 2021, near to cars from an an Amtrak train that derailed Saturday just west of Joplin, Mont. The westbound Empire Builder was en route to Seattle from Chicago, with two locomotives and 10 cars. (AP Photo/Ted S. Warren)
            
              Workers walk Sunday, Sept. 26, 2021, next to cars from an Amtrak train that derailed Saturday just west of Joplin, Mont. The westbound Empire Builder was en route to Seattle from Chicago, with two locomotives and 10 cars. (AP Photo/Ted S. Warren)
            
              Workers examine a section of railroad track, Sunday, Sept. 26, 2021, next to cars from an Amtrak train that derailed the day before just west of Joplin, Mont., killing three people and injuring others. The westbound Empire Builder was en route to Seattle from Chicago, with two locomotives and 10 cars. (AP Photo/Ted S. Warren)
            
              Heavy equipment is shown Sunday, Sept. 26, 2021, next to cars from an Amtrak train that derailed a day earlier just west of Joplin, Mont., killing three people and injuring others. The westbound Empire Builder was en route to Seattle from Chicago, with two locomotives and 10 cars. (AP Photo/Ted S. Warren)
            
              Jason Jarrett, of the Gallatin County (Mont.) Sheriff's Office, talks on a phone Sunday, Sept. 26, 2021, near an Amtrak train that derailed a day earlier just west of Joplin, Mont., killing three people and injuring others. The westbound Empire Builder was en route to Seattle from Chicago, with two locomotives and 10 cars. (AP Photo/Ted S. Warren)
            A person uses survey equipment, Sunday, Sept. 26, 2021, near an Amtrak train that derailed Saturday just west of Joplin, Mont. The westbound Empire Builder was en route to Seattle from Chicago, with two locomotives and 10 cars. (AP Photo/Ted S. Warren) Workers walk Sunday, Sept. 26, 2021, next to an Amtrak train that derailed Saturday just west of Joplin, Mont. The westbound Empire Builder was en route to Seattle from Chicago, with two locomotives and 10 cars. (AP Photo/Ted S. Warren) A worker peers under an Amtrak train engine, Sunday, Sept. 26, 2021, that was part of a train that derailed Saturday just west of Joplin, Mont. The westbound Empire Builder was en route to Seattle from Chicago, with two locomotives and 10 cars. (AP Photo/Ted S. Warren) Law enforcement officials stand at a railroad crossing, Sunday, Sept. 26, 2021, just west of where an Amtrak train derailed the day before near Joplin, Mont., killing three people and injuring others. The westbound Empire Builder was en route to Seattle from Chicago, with two locomotives and 10 cars. (AP Photo/Ted S. Warren) Heavy equipment moves gravel Sunday, Sept. 26, 2021, next to cars from an an Amtrak train that derailed Saturday just west of Joplin, Mont. The westbound Empire Builder was en route to Seattle from Chicago, with two locomotives and 10 cars. (AP Photo/Ted S. Warren) A worker peers under an Amtrak train engine, Sunday, Sept. 26, 2021, that was part of a train that derailed Saturday just west of Joplin, Mont. The westbound Empire Builder was en route to Seattle from Chicago, with two locomotives and 10 cars. (AP Photo/Ted S. Warren) Sarah Robbin, Disaster and Emergency Services coordinator for Liberty County, speaks about the Amtrak derailment at a press conference in Chester, Montana on Sunday, Sept. 26, 2021. (Amy Beth Hanson) In this photo provided by Kimberly Fossen people work at the scene of an Amtrak train derailment on Saturday, Sept. 25, 2021, in north-central Montana. Multiple people were injured when the train that runs between Seattle and Chicago derailed Saturday, the train agency said. (Kimberly Fossen via AP) This photo provided by Kimberly Fossen shows an Amtrak train that derailed on Saturday, Sept. 25, 2021, in north-central Montana. Multiple people were injured when the train that runs between Seattle and Chicago derailed Saturday, the train agency said. (Kimberly Fossen via AP) In this photo provided by Kimberly Fossen an ambulance is parked at the scene of an Amtrak train derailment on Saturday, Sept. 25, 2021, in north-central Montana. Multiple people were injured when the train that runs between Seattle and Chicago derailed Saturday, the train agency said. (Kimberly Fossen via AP)