What caused a 565foot construction crane to topple to the ground in tribeca yesterday killing a man on the sidewalk. Officials want to recover the cranes computer which could provide vital clues. Meanwhile, theyre collecting pieces of the crane investigation. A. J. Ross is in tribeca this evening. Sandra and joe, the ongoing process of removing this crane is not about speed but precision. And now this structure is being carefully cut into 35 pieces to be shipped off and analyzing so engineers can figure out what caused this terrible accident. Reporter in the aftermath of a tragedy that has left so many shaken, engineering experts are now carefully sifting through and dissecting the remnants of this massive crane hoping theyll reveal clues as to what the crane removal has started. Reporter during a press conference, they talked about the retrieval of the cranes removable computer that stores data that may prove helpful to the investigation. It will likely give us the angles of the boom.