The movie 'Saw' doesn't depict the supposed true story accurately. It takes the basic concept, like a killer with a unique modus operandi, and then runs wild with it. There are elements of torture and elaborate traps in the movie that are far more extreme than what might have been in any real - life inspiration. The movie is designed to horrify audiences, and in doing so, it strays far from any accurate representation of a true story.
Accuracy is not a strong point when it comes to how 'Saw' depicts any true story it may be based on. The creators were aiming for a horror - filled, high - tension experience. They took the idea of a criminal with a complex set of 'rules' for his victims and turned it into a series of grotesque and elaborate scenarios. The real - life inspiration, if there was any significant amount, is lost in a sea of fictional horror elements like the Jigsaw Killer's over - the - top lairs and the extreme nature of the 'games' the victims are forced to play.