A Killer Not Found

14 years ago, after going missing for six months, John Craig was found murdered in his mothers driveway. He lived a life of cheating, stealing and taking advantage of those that were willing to help him. Not knowing who he could trust or where he could go, John's fate was sealed, and the murder weapon was found in the position of someone he loved and trusted most.
His killer was never found, and now that over a decade has passed, the murder weapon has resurfaced. Who is responsible? How did the weapon reappear 14 years later?