Detective Sarah Johnson stared at the lifeless body on the floor, eyes wide with shock and disbelief at the gruesome scene. The victim's head lay in a pool of blood, a single bullet wound to the temple, no signs of struggle or defense. Sarah knew this case would be difficult, with no witnesses, no motive, and no suspects to question or investigate further. She took a deep breath, steadying her nerves as she surveyed the area, searching for any clues to piece together. The apartment was lavish, expensive furniture and decor, a stark contrast to the violence that had transpired within its walls.