Late one Friday night, a museum curator is found dead beside a shattered display case. A priceless artifact has disappeared. Four people were inside the museum that night. One of them is the killer. Your job is to examine the evidence, question the suspects, and determine who committed the murder.

A corporate executive is found dead inside his office. The door was locked from the inside. There are no signs of forced entry. And four people inside the building had a reason to want him dead. Your job is to examine the evidence and determine who committed the murder — and how they escaped a locked room.