These interlocutory appeals were filed under Abney v. United States, 431 U.S. 651, 97 S.Ct. 2034, 52 L.Ed.2d 651 (1977). Appellants complain about the conduct of the prosecutor and the use of perjured testimony before the grand jury. This court recently held that motions alleging “grand jury irregularities” are not appealable. United States v. Garner, 632 F.2d 758 (9th Cir. 1980). Appellants have demonstrated no reason to distinguish this case from Garner. Thus, we dismiss these appeals alleging prosecutorial misconduct and the use of perjured testimony before the grand jury for lack of jurisdiction.

Moreover, we affirm the district court’s dismissal of Tindell’s vindictive prosecution claim.1 The district court did not abuse its discretion in concluding that Tin-dell did not present sufficient facts to prevail on this issue.

The vindictive prosecution appeal in reality is nothing more than the post hoc ergo propter hoc fallacy.2 The proposition asserted is that any nontarget grand jury witness who claims the privilege against self-incrimination can thereafter never become a target no matter what the ongoing investigation uncovers; this is so preposterous on its face as to require no discussion. This is not a case in which the prosecutor reindicted on a more serious charge after the defendant asserted constitutional rights in the course of an ongoing prosecution. See Blackledge v. Perry, 417 U.S. 21, 94 S.Ct. 2098, 40 L.Ed.2d 628 (1974); United States v. Griffin, 617 F.2d 1342 (9th Cir. 1980). There was a total absence of proof in this case that the prosecutor had proceeded against Tindell because he had exercised a constitutional right. In the absence of a strong showing of the causal connection between the exercise of the right and the prosecution, there is no threshold fact to trigger the Griffin3 inquiry, either in the trial court or upon Abney review in this court.

The district court’s dismissal of Tindell’s vindictive prosecution claim is affirmed. Each of the other appeals is dismissed without prejudice to preserve on appeal from a final judgment any nonfrivolous claim of a denial of due process.