thyself things? >> well, you know, there is no way that anybody can prepare themselves for a child's homicide. just in the singular sense. this, the amount of recommend're victims and their age is beyond overwhelming. and i am sure that you know, detectives and forensic personnel. they have to detach themselves for that period of time to do their job. this is it a horrific scene and a horrific crime that no one will get over and no one seeing the scene will be quite the same. >> mark, thank you for joining us tonight. >> straight ahead, you will hear the chilling radio calls as police learned about the mass shooting, that's next.