What I do to not make myself suspicious is lie lie lie. I lie about everything that has happened or is happening and I laugh under my breath because of how my lying is working. It's hilarious to see the results and how I kill people and just lie about it. Sometimes I just kill someone in front of a large group and then just run away so I don't get killed and think about what I've accomplished.
When I'm a T, I typically just kill everyone but then falsely deny me ever doing it if accused I also use a bind to say "IT'S HARPOON TIME BABY" right before I harpoon people