I scared myself last night, I had a dream about murdering people.
Oh dear, that sounds scary! Why did you have a dream about murdering people?
I think I might be a psychopath, that dream really has me nervous.
Sometimes dreams are just dreams, and we shouldn't put too much weight to their content even when it's disturbing. However, if you feel like you're having murderous thoughts, then you should speak with a therapist to help you sort those out. If left unchecked, then thoughts about murdering people can evolve into dangerous actions.
I'll see if the dreams continue, I'm not sure that I really need to speak to a therapist.
Having dreams about murder could really be scary. It's difficult to say if your subconscious is revealing something about your mind. To be safe, I would speak to a therapist about the dream.