The Totally Optional Prompt is 'Mystery Thriller'

This week's challenge is to write a mystery, which is not the same as a puzzle or a riddle. As near as I can tell there needs to be potential threat or peril, suspense that it could happen, and then something else happens. There might be a shocking crime, a dreadful criminal, a breathtaking getaway, or a lost opportunity. You might also have some useful suggestions on how to write a mystery thriller.

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Remarks on the prompt, your latest poetry discovery, or this 'poetry exchange' blog can be made as comments to this posting. Late Wednesday night, between one rerun and another, I'll post a Request For Poems, where you can leave a link to your poem inspired by the prompt, or any other poem you want to share.