There was a start with criminal profiling as shown on various TV shows today. However, in the Netflix series Mindhunter we are introduced to the start of that analysis. Two detectives from the FBI start to travel across the country to speak to convicted criminals who have committed heinous crimes. With each interview they learn something new. With each interview they are able to discover what makes them tick. However, their personal lives start to take a toll between travel and work commitments.