That’s kind of the plot of Mad Love, with Peter Lorre, where a pianist gets a hand transplant from a executed knife thrower/murderer! The pianist is later accused of murder.
I have a nephew who is very very OCD. It affects his day to day life in so many different ways. He had grown his hair out long for a few years, and then recently decided to have it cut short and clean cut again. The hair dresser took off an 18” ponytail. He doesn’t want it to be donated or thrown in the trash, because he’s afraid someone will turn it into a wig, and then commit a crime for which he will be blamed. It’s possible, but extremely unlikely. This is just one example of how his OCD disrupts his life. He just turned 40. I don’t think he can be helped at this point. It’s very hard on his family.