One theory that might fit Gary Ridgway's case would be the rational choice theory of criminology. Rational choice theory is based on the concept of hedonic computation. Hedonic calculus is essentially “making calculations about the idea of ​​seeking pleasure and avoiding pain” (Boyd, 2016). This means that people weigh the pros and cons of their actions to avoid punishment. I think this could potentially fit and explain Ridgway's modus operandi in that it was worth raping them for his own sexual pleasure, but he thought if he let them live he would be punished, which is why he killed them and got rid of the They. bodies in the river and in the areas surrounding the city. Another theory of criminology could be the psychodynamic theory. This theory is based on the id, the ego and the superego. The simplest way to explain the id is that it is the pleasure center that is part of the unconscious mind (McLeod, 2016). The ego tries to satisfy the demands of the id but in a realistic way, while the superego tries to satisfy the id and the ego by respecting its own morals and values ​​(McLeod, 2016). This applies to Ridgway's case in the sense that perhaps his Ego and Superego were so repressed that his entire mind was focused on the sexual demands of the Id. Another theory could be the strain theory which explains the greater chances of criminal behavior when certain stress factors are present in one's individual