A murder victim is found in a rural ditch. He is a slight man — approximately 110 pounds — and fully clothed. Among his clothing is a leather belt that is twelve inches too long for his waist. The medical examiner confirms all other clothing fits the body proportionally. An investigator says this single detail changes her working theory about the crime. What does a belt twelve inches too long on a 110-pound victim suggest, and why would this change an investigator's theory?