(a) A person commits the crime of bribing a witness if he offers, confers or agrees to confer any thing of value upon a witness or a person he believes will be called as a witness in any official proceeding with intent to:
(1) Corruptly influence the testimony of that person;
(2) Induce that person to avoid legal process summoning him to testify; or
(3) Induce that person to absent himself from an official proceeding to which he has been legally summoned.
(b) This section does not apply to the payment of additional compensation to an expert witness over and above the amount otherwise prescribed by law to be paid a witness.
(c) Bribing a witness is a Class C felony.