The night was dark, the moon obscured. Suddenly, a chilling scream pierced the air. It emanated from the old abandoned mansion. People gathered, their faces etched with fright. A police officer pushed through the crowd. He strode up the creaky wooden steps. With trepidation, he entered the house. Ancient portraits stared down menacingly. A dim lantern cast flickering shadows. He advanced towards the source of the cry. In the library, a body lay prone on the floor. Blood pooled around the lifeless figure. The room seemed to spin, and the officer wavered. Malevolence permeated the very air. He leaned in to examine the body. The victim had been brutally stabbed. The officer's heart raced as he scanned the scene. Who could have committed such a heinous act? And why were the windows sealed shut? He reached for his radio to call for backup. As he spoke, a deafening silence fell. The murderer had not yet been discovered.