Detective Brown reviewed the information they had on the case so far. A lady was found shot and they already had a list of suspects - John, Mark, Sarah, Henry, and Carol. Plus, there were five notes that were found that were from the killer.
The first was found in a supply room.
The second was found in an art studio.
The third was in a restroom.
The fourth in an animal shelter, and
The fifth at the harbor.
All of the notes read the same thing, "The clues are where you find the notes." Yet, nothing was found at anyplace the notes were.
Taking one more look at all the clues, Detective Brown immediately solved the case.
Who did it?