To prove/disprove the validity or amount of a disputed claim or to impeach by a prior inconsistent statement or contradiction, the following can’t be offered:
• Furnishing, promising, offering, or accepting (or promising or offering to accept) a valuable consideration in attempting to compromise the claim
• Conduct or statement during compromise negotiations related to the claim
Exception: In a criminal case when negotiations are by a public office in its regulatory, investigative, or enforcement authority
However, it may be introduced for another purpose such as:
• proving witness bias;
• proving prejudice;
• negating contention of undue delay; or
• proving obstruction of justice