It was obvious duh.. the hostage girl had their mouth covered and the other guy unconscious (making them unable to tell anything) leaving alone only shibe who could talk.. And That tenji was so stupid for giving that gun to shibe.. he should've brought it with him... I knew the moment that gun goes to shibe that when the truth will be revealed he'll shot her.Also shibe was suspicious from the beginning.. at that time when they were searching for yuuchi , he told her to inform him first if she found him.. 