The body lay face down in a pool of dark blood. Detective Jameson knelt to examine the gruesome crime scene. A single bullet hole marred the victim's forehead. No witnesses. No signs of struggle or forced entry were apparent anywhere. Jameson's experienced eyes scanned the area for any clues. A glint of metal caught his attention on the floor. He picked up the object, a small golden cufflink. Engraved on the back was the letter "M." Meaning unknown. Jameson slipped it into an evidence bag carefully. This was just the beginning of a complex investigation.