If the buddy was disrespectful, excessively reckless, or did something else to distinguish himself, the enforcement officer may request his colleague to tell his friend how the world turns (e.g. dispense an ass-chewing or ass-kicking, as may be appropriate).

FORBES: Do Law Enforcement Officers Have "A Code" Or A Culture Where They Overlook The Transgressions Of Other Cops Or Retired Cops?