Civil rights suits for constitutional torts committed by federal actors are known as Bivens actions after the 1971 Supreme Court case that first authorized them for a search and seizure that violated the Fourth Amendment. The special bite for a Bivens claim is that they are meant as a potent remedy for serious misconduct and are lodged against government officials and agents personally. A jury trial is permitted and can include compensatory and punitive damages.
Defenses to a Bivens claim include that there was no violation of the constitution or that the officials have absolute or qualified immunity. It would make for quite a turnaround for Garland, Smith, and others to try to claim official immunity as a defense. Venue for such a case would be in Trump friendly Palm Beach County, not Washington D.C.
Before it's over, such a lawsuit might include Letitia James, Fani Willis, and Alvin Bragg. And who knows, even a couple of judges might be ensnared.
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