Luigi Mangione wants his trial televised and open access to as much media and public as possible. Prosecution does not.
(discuss.online)
This doesn't prove dogs can't detect odors. At best it implies bias in officers which is not really what you suggested. It's also a lone study.
I work adjacent to this field so these kinds of claims coming from someone who clearly doesn't makes it sound like you don't really know what you are talking about.