My theory for Detroit Become Human is that Todd has anger issues but it's caused by his sadness, of course that is obvious but I think I know a few things that revolve around his anger.
Theory 1. Todd didn't remember the fight between him and Kara (if Todd is still alive on your play through that is), he only remembers half of it like after he got hurt, he told the story that he thought happened but later on he realizes that the story he told was false.
Theory 1a. This is a alternate theory for theory 1: He was so high on red ice, he doesn't remember half of the fight because he blacked out in it, he later defended himself from the android thinking it was fighting HIM, not that he's fighting Kara.
Theory 2. Todd did remember all of it and is just a richard.