Footprint

Footprint is a print from foot when the murderer marks when where he was to escape and some chances that his boots were blooded so this is reveal to be a real murderer. You must find the shoe shop and talk to shoemaker to search the samples of the shoe of the suspect you're looking for.

Like this:

When the shoemaker found that the suspect you looking for is positive, it means this item was the scene of the crime, in my opinion when the footprint in Shades of Mystery is a bloody footprint or dirty footprint however this is rated as a 2 stars.