The Importance of Footprints in the Crime Scene

The footprints, which you and I think could be moderately valuable, nothing to groundbreaking most likely. The police didn't protect the scene and gazillion people trampled through and ruined all of the muddy footprints. It just seems like an odd location. We don't know very much about this at all. So let me look at the note and try to decipher it one more time.