Law enforcement is a para-military operation. It has to be because without rules and policies there would be anarchy within the ranks.
I began my career in a department that had a strong adherence to the chain of command. The shift Sergeant was the person who made the final decision on calls where his/her input was needed. The shift Sergeant could also instruct an officer on the way the call should be handled sometimes without request. This didn't always sit well with some officers.
The Command Staff or Chief of Police seldom interfered. I saw officers try to by pass the Sergeant and go up the chain of command in an effort to change a decision. The Sergeant would never interfere with an officer going up the chain of command as long as the officer respectfully asked the Sergeant if he/she could do so. That is how the chain of command is supposed to work.
The majority of police officers respect the chain of command. There are some who don't and I refer to them as Connivers, Ass Kissers, and Sneaky Snakes.
The Conniver often tries to by pass the chain of command by engaging someone from the command staff in conversation and while discussing a neutral topic will input information in an attempt to undermine the Sergeant's decision. Connivers are adept at locating and exploiting weak links in the chain of command.
The Ass Kisser is another threat to the Chain of Command. They are easily spotted due to their always attempting to curry favor from anyone with rank in order to feather their own bed. They almost always try to create an off the job close friendship with higher ranking personnel. Their biggest mistake is bragging about their relationships with the brass to rank and file officers.
The Sneaky Snake is the most dangerous because he/she works covertly in his/her attempt to undermine the Chain of Command. The Sneaky Snake will leave items laying about such as unfinished/unsigned offense reports that paint the Sergeant in a bad light. They also lie or falsify reports in areas where no witnesses can collaborate their statements. I once heard of a Sneaky Snake who tried to undermine a promotional process by obtaining the personnel files of other candidates. The files contained past personnel complaints which were mailed to board members and others outside the agency who had influence in the city.
All three of the above can ruin a law enforcement agency if they are allowed to ply their unscrupulous behavior.
The Sergeant isn't perfect but his/her decisions are usually based on the good of the department and community. My FTO told me, "The Sergeant is not God, but he's pretty close."
That's the way I see it.