Whether actual prejudice to a defense from preindictment delay, by itself, requires dismissal under the Fifth Amendment's Due Process Clause.
Holding
No. Actual prejudice is generally necessary to make a due-process claim concrete, but it is not sufficient by itself to require dismissal; courts must also consider the Government's reasons for the delay.
Reasoning
The Sixth Amendment Speedy Trial Clause does not govern delay before a formal indictment, information, arrest, or comparable restraint. As United States v. Marion held, statutes of limitations are the primary protection against stale criminal charges, although the Due Process Clause supplies limited additional protection against oppressive preaccusation delay.
Marion did not establish that every delay-caused loss to a defendant's case requires dismissal. Even a brief and entirely necessary delay may impair a defense. Thus, proof of actual prejudice makes a due-process claim ripe for decision, but the constitutional inquiry also requires an assessment of why the Government delayed.
Due process asks whether requiring the accused to stand trial offends fundamental conceptions of justice and the community's sense of fair play and decency. Courts may not dismiss prosecutions merely because they would have made a different charging decision or regard the prosecutor's timing as imprudent.