Indiana Code Title 4. State Offices and Administration § 4-21.5-3.5-26

Sec. 26. (a) Mediation shall be regarded as a settlement negotiation.  Evidence of furnishing or offering or promising to accept a valuable consideration in compromising or attempting to compromise a claim that was disputed as to either validity or amount is not admissible in a proceeding to prove liability for or invalidity of the claim or its amount.

(b) Evidence of conduct or statements made in the course of mediation is not admissible.  However, this subsection does not require the exclusion of evidence otherwise discoverable merely because it is presented in the course of the mediation process.  This subsection does not require exclusion when the evidence is offered for another purpose, such as bias or prejudice of a witness or negating a contention of undue delay.