been involved in this attack but not less. this man, this woman, investigators say, are the murders. so there is more in this interview about what was known and not known by the family. we're going to show that to you. right now, we want to keep a balanced focus here, not just on the villains but on the heroes as well and the victims overall. so the officer who was first to respond to this shooting is now describing the carnage that he encounter. police lieutenant mike madden, on his way to lunch when dispatch sent out the alert and he rushed to the scene, assembled a team and entered the building. what he saw inside the conference center, he says, was something he could have never prepared for. take a listen. >> the situation was surreal. it was something that i don't think, again, we prepare for and they try to -- an active shooter, we talk about sensory overload, they try to throw everything at you to prepare you for dealing with that. what you're seeing, what you're hearing, what you're smelling. and it was all of that and more.