out. >> and firing from a room like the one we're in, if you knock out this window and fire toward him, that doesn't work. >> we still wouldn't be able to see him more than likely because we're not seeing deep enough into the room and only when he fires will we be able to see him. >> he insists the choice of the room put the swat team at a disadvantage and he blocked the stairwell door and wired the hallway with cameras so he could see police approaching. >> because of his counter measures placed in the peephole and in the hallway, he observed the security guard and he was in fear that he was about to be breached. so he was doing everything possible to figure out how he could escape at that point. >> but shee han says if the shooter could have gotten away, is it wouldn't have been for very long. >> there's one of three ways it's going to end for an active shooter. you're going to commit suicide, die in a hail of gunfire with the police. you're going to shoot it out with them and you're going to be cared. or you're going to continue on a