The cop dog was on an undercover assignement, secretely given to him as part of a special investigation known only to dog and the chief (or maybe it was the second in command) of the force's internal affairs department.

The cops, who may actually have been suspects in this covert investigation, have now blown the dog's cover, so that a new plan for the entire program will need to be developed.

It's all quite obvious, for anyone who'se observed Texas police beyond what's in the national newspapers. (The local media may be asked to withhold details, of course.)

John