The American justice system is imperfect, which is a charitable way of saying that it’s a real mess. If you are an unarmed Black man, for example, you might want to take your chances running from the cops even if you only committed a minor crime or are innocent altogether. At least that way you’d be more difficult to hit when they start shooting.
If you are a well-connected rich white guy, however, there really is no reason to run from the law, plead the Fifth, destroy evidence, fight subpoenas, perjure yourself, or seek pardons.