https://www.youtube.com/watch?v=ee4hBZ9CbpY
Obviously, I dismiss this poor guy as mentally ill (that's kind of what makes most homeless people homeless), but this clip is fascinating. Your homework is to draft, in any format (synopsis, script segment, chapter excerpt), some or all of an idea for a story based on the content. Start with a simple premise: everything he says is true. He is a police officer. They are killing people.