The Detective Presents the Evidence

What is the best part of a detective story? We think it's the moment that the detective presents the evidence. The detective gives a list of strange, unrelated items and from them, the criminal is discovered. That might be the best part. This book is nothing but the good parts. There are 40 tiny stories where we meet a detective and they let us know what the crime is and give the clues. And that's it.
What about the big reveal of who the bad guy is? We leave that to you. This is a collection of experimental short fiction that gives hints of different genres and tones. Can you solve all these crimes before it's too late?