Murder Mystery: A ChatGTP Short Story

I want you to write me a short story, no shorter than 750 words and no longer than 100 words. The genre of this short story will be a murder mystery. Draw inspiration in your writing from Sherlock Holmes or even new-age murder mystery books and movies. Make sure to keep the themes dark and intriguing. There must be a twist at the end; one which the reader would not have expected.