Information for Murder Trial Tonight - III - The Doorstep Case at New Theatre, Cardiff (Play). Set in a courtroom, you are walking into this show as a member of the Jury. Like any Jury member, you don't know much about what you are walking into. All you need to know is that it's your job to watch the live Murder Trial taking place on the stage and listen to all the evidence presented to you from both sides and then you must deliberate on what verdict you will deliver, Guilty or Not Guilty. This murder trial is based on a true story. In the third season, a mother returns home in the early hours of the morning after a night out celebrating her birthday, only to find her daughter murdered on her doorstep. The boyfriend of the daughter has been charged with the murder. Is he guilty, or is the killer still at large?