Well, from 'Mind Hunter Based on a True Story', we learn about the early days of criminal profiling. It's interesting to see how the agents interviewed killers in prison to understand their thought processes. This knowledge helps in preventing future crimes as it gives insights into the criminal mind.
One thing we can learn from it is the importance of understanding the human psyche in the context of crime. The show based on a true story shows how difficult it was for the investigators to get into the minds of these extremely deviant individuals. It also shows how society and upbringing can play a role in shaping a criminal, which is valuable for criminology research.