(a) A person commits the crime of tampering with a witness in the first degree if the person knowingly induces or attempts to induce a witness to (1) testify falsely, offer misleading testimony, or unlawfully withhold testimony in an official proceeding; or
(2) be absent from a judicial proceeding to which the witness has been summoned.
(b) Tampering with a witness in the first degree is a class C felony.