When the body of a professor and family man is discovered in the office of a used car dealership, Detective Postiglione solves the puzzle after recalling a specific clue that gave the killer he spots the killers window of opportunity.

The crime scene of a double murder shows evidence of conflicting motives. But an unlikely clue on the living room floor helps Detective Postiglione zero in on what really happened, leading to the arrest of an unassuming killer.

When the remains of a young mother are discovered in a remote area outside Nashville, Detective Postiglione solves the crime by recalling a detail from the wooded scene and puts a dangerous murderer behind bars.

While investigating two separate homicide cases, Detective Pat Postiglione discovers that the same psychotic killer is behind all the murders and has a unique calling card.

Twenty-six-year-old Florence Ballino is found murdered; her attacker deliberately leaves behind clues in an attempt to confuse investigators, but Detective Postiglione identifies one clue that inextricably connects to the killer.

Detective Postiglione investigates a crime scene where pools of blood indicate that something terrible occurred, but the female victim is nowhere to be found; it's up to Postiglione to find her and a possible murderer.