Elementary seems to be overly fond of using shots that would normally suggest that the protagonists are surveilled, i.e., they have all or most of the following properties:
They are taken from an unusually long distance (given the main content of the scene).
The angle is unusual but would fit a human’s point of view.
They are unnecessarily obscured by some foreground object.
The camera is moving slowly.
If this were any other show, I would expect such a shot to show the perspective of somebody surveilling whoever is the main subject of the scene, and thus in particular take it as a hint for the audience that surveillance is happening.
Note that these are not the most blatant examples, but the best I could find without re-watching entire episodes.
From Episode 22 – Risk Management:
From Episode 57 – The Eternity Injection:
While in most of this scenes (like most of the series), surveillance wouldn’t be totally unexpected, it is never brought up in the respective episode. Of course, these could be red herrings, but that does not fit the series’ style: The law of conservation of detail is strictly obeyed¹ and red herrings are intensively discussed by the protagonists if they appear. Also, in some cases where it turns out later that somebody actually is under surveillance, such shots are not used.
This begs the question: Why are these shots made the way they are?
Note that such shots are used by different directors, so it does not seem to be just a quirk of one of the series’ directors.
¹ to the extent that it is a reliable tool for viewers who want to guess the culprit