Dolphin surveillance

[Sommer]

When a [surveillance] team [blatently] exposes themselves on purpose, and then dissapears completely, giving a suspect false security.
Based on how dolphins are observed in the ocean...
now you see us, now you dont
A sloppy and easy to spot team trails a suspect, gets noticed, and then after awhile, they stop pursuing the suspect. The suspect realizes that the people [spying] on him have stopped, and then gets a false sense of security.
It would be as if the people [tailing] you had left you for a picnic. (or so you think...)
But instead of the sloppy team tailing the suspect, a new upscaled professional team moves in to do surveillance, with precision and fixed posts.