Let's just ask ourselves some silly question and try to explain that it's nothing at all.
Person 1: Why are you covered in blood?
Person 2: Blood? Nah, it's just paint. I was working on an art project. Why are you wearing nothing but a towel in my backyard anyways?
Person 1: ...
You can continue on the current situation or just make a new one.
> What were you doing last night? I heard a gunshot from your house.