[QUOTE=acsenray]
Every police department gets to choose its own rank structure. Generally speaking, though, “detective” is an assignment, not a rank, and each detective holds a rank equivalent to a non-detective rank.
[/QUOTE]
That’s not the way it is in the NYPD, however. Detective is a separate rank more-or-less between Police Officer and Sergeant. There is no such thing as a Detective Sergeant or Detective Lieutenant. Friedo listed the basic rank structure of the NYPD, but omitted Detective, which I’d put off to the side half-way between Police Officer and Sergeant.
When a “white shield” (actually silver) Police Officer is assigned to an investigative role, he can be given a “gold shield” and designated a detective (I don’t believe that this is considered a formal promotion under the civil service rules). Detectives start out as a Detective Third Grade, earning somewhere between a Police Officer and a Sergeant. Detectives may be advanced in grade to a Detective Second Grade, who earns approximately what a Sergeant makes. The very top Detectives (traditionally the top 100 Detectives in the NYPD) become Detectives First Grade, who earn approximately what a Lieutenant makes.
Despite all of this, Detectives of any grade do not have any command authority over other officers (and I believe that legally they are considered the same “rank” as white shield Police Officers).
To have command authority, a Police Officer or Detective must be advanced to Sergeant after a civil service exam and promotion off a civil service list. Likewise, a Sergeant must follow the civil service procedures to get promoted to Lieutenant, and similarly, Lieutenant to Captain, which is technically the highest civil service rank. Once an officer is a Captain, all advancement is in the sole discretion of the Police Commissioner (who has the authority to demote a higher-ranking officer, even the four-star Chief of Department, down to Captain as well).
So, in the NYPD, a Detective is a Detective, a first-line officer charged with investigating crimes. His squad would be commanded by a Sergeant or Lieutenant (or higher) assigned to that position from the overall pool of Sergeants (or whatever rank). So, there is a chance that an investigative unit commanded by a Sergeant could have within it a Detective First Grade that makes more than he does. However, because of this, and to avoid the disincentive to experienced Detectives from trying for promotion, some Sergeants and Lieutenants that command detectives can get a special designation that increases their pay to approximately that of officer a rank higher (i.e. a Sergeant supervisor would be paid like a Lieutenant).
I think on “Barney Miller” they didn’t slavishly follow NYPD procedures, but decided that a few of the investigators there would be Sergeants. Another difference is that I understand that precinct detective squads are generally commanded by a Sergeant or Lieutenant, not such an august personage as a Captain.
However, Inspector Luger was pretty clearly Barney’s boss. In the NYPD, an Inspector is two grades higher than a Captain (and wears gold eagles, similar to those of a U.S. Army Colonel). I know that in some other (particularly West Coast) departments an Inspector is a mid-level investigative rank (somewhere in the Sergeant-Lieutenant range), but not in the NYPD.