A spectacular example of this has been captured by 20-year-old Brett Darrow. Last Friday, Darrow captured, on video, an arrogant, abusive, foul-mouthed, illiterate, cretinous, power-intoxicated simian by the name of Sgt. Kenline [actually, Kuehnlein -- see update and correction below] threatening to perjure himself to justify arresting the motorist -- simply because Darrow wasn't properly submissive to somebody wearing a State-issued costume.
"Try and talk back ... to me again," snarled Kenline, who took offense when Darrow politely and compliantly asked what violation justified his detention: Merely asking an agent of the State to justify such an action, you see, is grounds for arrest. And Kenline understands that he has the power -- not the authority, mind you, the power -- to commit acts of violence against Darrow to deprive him of his freedom, and then lie about the circumstances afterward.
Turns out that the cop in question was able to get a judge to expunge his criminal record....so he could become a police officer. Those records were also helpfully sealed, making it difficult for the public to learn that, for example, the cop was once arrested for assault.