A group of robbers kill a security guard who used the APB app before his death; Gideon redesigns a feedback chair, for use in the investigation room; Murphy learns that her ex-husband may be watching them.
An ex-cop turned security guard and friend of Murphy is killed by some men robbing a jewelry store. They manage to catch one of the robbers but he doesn't want to talk. So Gideon puts a special chair in the interrogation room that can detect stress levels and they use it to get the man to reveal things. Murphy tells Gideon what her ex is doing. Ada goes out to help someone who is being physically abused.—rcs0411@yahoo.com