Anomalous Couriers

Human mimics came without warning. Whole cities have built walls, distrustful of outsiders. The need for couriers has risen exponentially to deliver essentials, as vehicle delivery has become dangerous. Now, more than a year since the outbreak, mimics have adapted to become almost indistinguishable from regular people. Your job is to interrogate incoming couriers for any signs of mimicry. See anything anomalous or not human? Don't hesitate to dispose of them! A short horror game.