Rule 408. Compromise Offers and Negotiations

(a) Prohibited Uses. Evidence of the following is not admissible--on behalf of any party--either to prove or disprove the validity or amount of a disputed claim or to impeach by a prior inconsistent statement or a contradiction: (1) furnishing, promising, or offering--or accepting, promising to accept, or offering to accept--a valuable consideration in compromising or attempting to compromise the claim; and (2) conduct or a statement made during compromise negotiations about the claim. (b) Exceptions. The court may admit this evidence for another purpose, such as proving a witness's bias or prejudice, negating a contention of undue delay, or proving an effort to obstruct a criminal investigation or prosecution.