>> carol, investigators have been working through the night and this morning they are doing the heavy lifting. just before daybreak, a couple cranes were brought in. they lifted the locomotive on to the track and two cranes are working their way down the line. they are picking up the derailed passenger cars and putting them on the track. it should help to point them to the cause of the deadly accident. overnight the names of all four passengers killed at the metro north commuter train crash sunday were released. police identified 54-year-old donna smith. >> donna was a wonderful person. she was kind, neighborly, friendly. >> reporter: 35-year-old ahn kisook, 59-year-old james ferrari and this man, 58-year-old father of four james lovell. >> i'll remember him as having dignity and determination and being, you know, a wonderful father. >> reporter: three of them ejected from the train, its cars