Officers have their own disression and can decide what price tickets or sentances could be,
“the extent of cooperation by the detainee should be considered when setting a jail sentence or issuing a fine.”
Its only the cooperation that should be considered but most of the time people scream down their microphones wanting a supervisor. This dosen't apply to current charges, but how a suspect acts or the ammount of time they take complying while being charged.
Its not only Snr officers, but all officers tend to do this since they have their own discression under law
4.1 Law-Enforcement Officer’s Discretion
Obviously this can be overrulled but this isn't very common unless in a supervisor sit.
Please look at the handbook section 5:
Make an IA complaint if they're doing this, it's unethical and they'll probably get a reprimand to help them learn. Or just refer them to the handbook.