Problem
Scenario:
While investigating a murder scene, police gather evidence that includes a dead body with a gun shot wound to the chest, bloody fingerprints on the front of the victim's shirt, a gun on the floor close to the body, and bloody shoe prints leaving the scene. Investigators determine that the gun belonged to the victim, and the bloody fingerprints was the victim's blood, but the fingerprints belonged to the victim's business partner. No blood was on the shoes of the victim. Through investigation, it was determined that the bloody shoe prints matched the size and type of shoes that the business partner had bought at an expensive department store one week prior to the incident. The prints did not match the shoe size or style of shoes owned by the victim.
What would be the best theory for this scenario?