There is an interesting subset of the “based on a true story” movies. Rather than a person, or time period, or some other broad event, there are a few that take a small incident and build around that. This would include movies like Compliance and Stuck, both interesting films that you should look into. The latest entry to this subset of movies is called Bad Ass. These are movies that take headlines and events and build a movie around them. They do not purport to be entirely true, instead they use the real elements as a launching point for their story.