Like of course you are a suspect. It's your restaurant. You have no alibi. No witness. And keeps saying you have no idea what happened. Idk why he expects to be innocent and off the hook. Hyunwook you are a cop ffs you know the legal process exist for a reason and from the police pov it makes a lot of sense to detain your boyfriend if we look at the facts.
Stop trying to kill your father in law!!