US undercover investigator Greg Squire can spend 18 hours a day befriending child sex abusers, to try to identify them and get justice for victims. He reveals the toll the work has taken on him US undercover investigator Greg Squire can spend 18 hours a day befriending child sex abusers, to try to identify them and get justice for victims. He reveals the toll the work has taken on him G reg Squire can never forget the video that opened his eyes to what child sexual abuse could mean. It was a