The guy left evidence meant to misdirect and he got away clean.
I also assume you have no law enforcement experience because you would have mentioned it otherwise. So let me ask this:
If you, as somebody who has no law enforcement experience, is able to figure out this quickly that the evidence left behind truly is intended only for "misdirection" then why assume that the investigation professionals wouldn't figure that out also, and discount it? And wouldn't a professional know that ahead of time?
Are you some type of comedian? I assume so from your posts.
I worked with the police on a daily basis for 25 years. Police Officers often hung around the fire stations that I worked at and discussed their thoughts and what they had working on that day. As a longtime leader of a Hazmat Team we often sat in and assisted with planning for take downs of drug related operations and also assisted the police in those and other types of operations. So, to say that I have no law enforcement experience based on me not talking about it in a few short posts demonstrates only your ability to jump to conclusions based on nothing.