speaking with several police officials in el paso, they're working furiously to put together clues about the gunman's planning for this attack and more information about his motive. what they're also giving us tonight is a horrifying new account of how cold and calculating he was. during the attack and while in custody. el paso police tell cnn tonight the man who allegedly carried out the slaughter at the walmart has been unapologetic. officials say patrick crusius has shown no regrets, no remorse for killing nearly two dozen innocent people. and has been cold emotionally while talking to investigators. that is consistent with how police are telling us he carried out the attack. >> the reports that we received is it was a calculated attack. it was well-planned out. and the reports that are coming out is that he showed no emotion and it appeared according to the videos and the eyewitness testimonies that he had some type of training on how he approached his victims.