Race Radio said:
Google is your friend
http://www.fas.org/sgp/crs/misc/RL31253.pdf
An act like stopping a key witness in a bar and threatening to tear him apart on the stand.......
In the hypothetical you propose, the statute of limitations is not extended by the acts of concealment. In the hypothetical you propose, an ongoing crime is being committed. You still haven't met my challenge, but you do present an interesting question.
The conspiracy has to have an OBJECT. It also has to have more than one conspirator. Acts taken in furtherance of that object are conspiratorial acts. As long as those acts keep happening, the conspiracy keeps happening. And you're right, the last act in furtherance of the conspiracy is when the statute of limitations clock starts to tick. When the object of the conspiracy is attained, the conspiracy is COMPLETE. You cannot commit an act in furtherance of the conspiracy after the conspiracy is complete. The terms "complete" and "object" are terms of art with meaning you can determine from reading the cases.
If the conspiracy is to dope, then the conspiracy to dope is complete when the doping is done. If the conspiracy is to commit fraud on the USA, then the conspiracy is complete when the fraud has been executed.
In Grunewald v. United States, 353 U.S. 391 (1957) The Supreme Court said this: "But a vital distinction must be made between acts of concealment done in furtherance of the main criminal objectives of the conspiracy, and acts of concealment done after these central objectives have been attained, for the purpose only of covering up after the crime." That case was about a conspiracy to corrupt a grand jury. Here is what the Court held: "We hold, therefore, that, considering the main objective of the conspiracy to have been the obtaining of "no prosecution" rulings, prosecution was barred by the three-year statute of limitations, since no agreement to conceal the conspiracy after its accomplishment was shown or can be implied on the evidence before us to have been part of the conspiratorial agreement."
Grunewald makes it hard for the feds to prove cover up as an object independent of the crime to dope or commit fraud on the USA, and that's exactly what the feds will have to prove in a conspiracy.
United States v. Upton, 559 F.3d 3 (1st Cir. March 5, 2009) (No. 05-1593) is perhaps the best case to rely on if you want to use covering up as a separate crime that was agreed upon as part of a conspiracy. It is, as the District Court noted, a very close case. In that case, which was decided over a dissent, the court found an ongoing conspiracy to commit a violation of 18 U.S.C. § 1956(a)(1)(B).
Your hypothetical situation fails because of Grunewald--specifically because you can't (a) specify a cover-up crime; (b) that Lance and another person agreed upon to commit; and (c) that the Aspen incident furthered.
Try again. As you say: Google is your friend.