first clause of § 1985(2). Clause 1 of § 1985(2) applies only to conspiracies to deter or alter testimony in any federal court proceeding. Section 1512, however, applies to attempts to prevent or influence testimony not only in federal courts but also before Congress, federal agencies, and insurance regulators. Moreover, § 1512(b) subsumes but is significantly broader than the provision of § 1985(2) making it illegal to “conspire to deter by force, intimidation, or threat” any person from testifying in a pending federal court matter. Section 1512(b) not only makes it a crime to attempt to deter testimony by force, intimidation, or threat, as does § 1985(2), but also makes it a crime to try to deter such testimony through sheer persuasion without the use of physical or e (D.C.Cir.1996) (<HOLDING>); United States v. Altman, 48 F.3d 96, 99, 104
holding that  the threat of future harm not yet realized is not enough  holding that defendants corrupt intent to influence testimony and exhortation to witness not to testify truthfully was enough to justify his  1512b conviction even with no direct threat of either physical or economic harm holding that in order to state a claim for ineffective assistance of counsel based on the failure to call a witness to testify the claimant must allege 1 the identity of the potential witness 2 that the witness was available to testify at trial 3 the substance of the witnesss testimony and 4 an explanation of how the omission of the testimony prejudiced the case recognizing that where witness has no constitutional or statutory right to refuse to testify jurors are entitled to draw negative inference from witness refusal to testify holding that witnesss testimony that he lied to investigators because his friend the defendant had asked him to do so was sufficient to sustain the defendants conviction under  1512b