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 he spots the killer's 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 determine 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, Tennessee, Detective Postiglione solves the crime by recalling a detail from the wooded scene and puts a dangerous murderer behind bars.

While heading up the investigation of two separate homicide cases, Detective Pat Postiglione makes a surprising discovery: the same psychotic killer is behind all the murders, and he has a unique calling card.

Florence Ballino is found dead in her apartment and her attacker deliberately left behind clues attempting to confuse investigators, but Detective Postiglione identifies one clue that inextricably connects to the killer.

Detective Postiglione investigates a crime scene with no victim to be found. Pools of blood indicate something terrible occurred, but a young woman is missing and it's up to Pat to find her and the possible murderer.

Pat can recall details from all of the cases he worked throughout the course of his long career, but the memories of investigating and capturing serial killers are some of his most vivid.

From the first moment Pat stepped foot into a crime scene as a rookie homicide detective in 1988, until the last time in 2013, Pat used his ability to remember images and details which he could later recall to help him solve the crimes.

What has become one of the most popular US tourist destinations is unfortunately, for Pat, a historical roadmap to every crime scene he ever encountered. Pat revisits some areas of Nashville where he has strong photographic memories of his cases.