Rules of Professional Conduct
Rule 5-310 Prohibited Contact With Witnesses
A member shall not:
(A) Advise or directly or indirectly cause a person to secrete himself or herself or to leave the jurisdiction of a tribunal for the purpose of making that person unavailable as a witness therein.
(B) Directly or indirectly pay, offer to pay, or acquiesce in the payment of compensation to a witness contingent upon the content of the witness's testimony or the outcome of the case. Except where prohibited by law, a member may advance, guarantee, or acquiesce in the payment of:
(1) Expenses reasonably incurred by a witness in attending or testifying.
(2) Reasonable compensation to a witness for loss of time in attending or testifying.
(3) A reasonable fee for the professional services of an expert witness.