ON PETITION TO TRANSFER
We grant transfer to decide whether a party is under an obligation to disclose the identity of an expert rebuttal witness in a civil case. Archbold Ladder Co. and The Sherwin-Williams Co. (Defendants-Appel-lees below) seek transfer after the Court of Appeals granted Bertha McCullough (Plaintiff-Appellant below) a new trial on the grounds that the trial court erroneously excluded testimony, offered in rebuttal, of a non-disclosed expert retained by McCullough.
McCullough v. Archbold Ladder Co.
(1992), Ind.App.,
Facts
In 1987, McCullough fell from a stepladder manufactured by Archbold and purchased from Sherwin-Williams. She sought recovery under Indiana’s Product Liability Act, Ind.Code § 33-1-1.5-1 through § 33-1-1.5-8, alleging that the stepladder was unreasonably dangerous. She also sought recovery on a theory of negligence. Discovery commenced and, in 1989, McCullough answered interrogatories. Interrogatory No. 19 sought the identity of each person who had or claimed to have any knowledge relevant to McCullough’s claim. Interrogatory No. 20 sought the identity of McCullough’s experts. Interrogatory No. 21 sought the identity of each person with whom McCullough or her attorneys had consulted or retained as expert witnesses in preparation of the trial of this cause. McCullough responded that she had not yet determined what experts she would call at trial, but she identified James A. Taylor of Timber Product Specialists in response to Interrogatory Nos. 19 and 21. McCullough made no objection to providing the information requested in Interrogatory No. 21. These answers were never supplemented.
In November 1989, & pre-trial order was entered, pursuant to which the parties were to file and exchange witness lists. The order also provided that “any witness or exhibit disclosed within thirty days of trial shall be permitted during trial only by leave of court and only for good cause shown,” and that “pursuant to Indiana Trial Rule 16, this Order, together with the filings herein ordered, shall control these proceedings, constitute the pre-trial order, and be strictly, enforced by the court.” In February 1990, McCullough filed a witness list indicating that James Taylor would be a witness. In September 1990, McCullough filed an additional witness list adding “all witnesses necessary for rebuttal” but identifying none of the rebuttal witnesses by name.
Depositions of the parties’ experts were taken. On October 2, 1990, one day after deposing defendants’ experts, plaintiff’s counsel contacted James Sobek and asked him to examine the ladder and determine what caused the ladder to break. Sobek was never disclosed as a witness prior to trial.
Trial commenced in April 1991. In her case in chief, McCullough presented the expert testimony of James Taylor who opined that the use of defective lumber in the stepladder led to the rotting of the ladder at the point of breakage, reducing its strength and causing it to break. Defense expert, Harold Core, testified that the wood of the ladder was not rotted. Edwin Burdette, also a defense expert, hypothesized that McCullough climbed too high on the ladder, lost her balance, and *178 broke the ladder when she fell on it. All of this expert testimony was consistent with the testimony given by the witnesses at their respective depositions.
After the defendants rested, McCullough called Sobek as an expert witness in rebuttal. Sobek is an engineer and physicist who would have testified that, based on his review of the physical evidence, the hypothesis offered by defense expert Burdette could not have been accurate. Defendants objected to Sobek’s proffered testimony on the grounds that (1) Sobek had not been disclosed prior to trial either in answers to interrogatories or on McCullough’s witness list, and (2) Sobek’s testimony should have been presented in McCullough’s case in chief and, therefore, was not proper in rebuttal. Relying on
Tanner v. State
(1984), Ind.,
The majority of the Court of Appeals concluded that because a rebuttal witness need not be disclosed under Indiana law, McCullough was under no obligation to identify Sobek, and it rejected defendants’ alternate contentions that McCullough was under a duty to supplement her discovery responses. The majority held that the trial court had abused its discretion in excluding Sobek’s testimony because exclusion of a witness is appropriate only when a discovery order has been blatantly and deliberately violated. Judge Baker dissented on the grounds that even if Sobek’s testimony was proper rebuttal testimony, McCullough was obligated to disclose his identity prior to trial, and the trial court acted within its discretion in excluding the testimony of an undisclosed expert.
In their petition to transfer, defendants contend that (1) McCullough was obligated to disclose the identity of Sobek as a rebuttal witness; (2) Sobek was not a true rebuttal witness; and (3) exclusion of Sobek’s testimony was appropriate.
Disclosure of Rebuttal Witnesses
Defendants argue that a known and anticipated rebuttal witness must be disclosed; plaintiff argues that disclosure is not required. Support for both propositions is found in the case law. For example, in
Chatman v. State
(1975),
McCullough points to language in other Indiana cases in support of her position that she had no obligation to disclose the identity of her rebuttal witness. For example, in
Floyd v. State
(1987), Ind., 503
*179
N.E.2d 390, 394, this Court held that “[t]he State is under no obligation to provide a defendant with a list of its rebuttal witnesses.”
Accord Smith v. State
(1990), Ind.,
After reviewing these cases, we hold that the Chatman line of cases expresses the better rule: the nondisclosure of a rebuttal witness is excused only when that witness was unknown and unanticipated; known and anticipated witnesses, even if presented in rebuttal, must be identified pursuant to a court order, such as a pre-trial order, or to a proper discovery request.
Several sources persuade us that this is the better rule. First, a trial is, in part, a factual search for the truth.
See Graves v. State
(1986), Ind.,
Second, disclosure of the identity of all witnesses fulfills the objectives of Indiana’s discovery rules. One of the purposes of our discovery rules is “to provide parties with information essential to the litigation of all relevant issues, to eliminate surprise, and to promote settlement with a minimum of court involvement.”
Canfield v. Sandock
(1990), Ind.,
We are not persuaded by McCullough’s argument that Sobek was not a “known and anticipated” rebuttal witness. McCullough argues that even if she anticipated the need for Sobek’s testimony before trial, as demonstrated by her attorneys’ consulting with him, she could not possibly “know” whether she would actually call Sobek until the defendant’s experts testified. This is so, explains McCullough, because if defendants’ experts had changed the opinions they expressed at their depositions, there would have been no need to rebut their testimony. We do not agree. A “known” witness refers to knowledge of the existence of that witness. An “anticipated” witness is one which a party or her counsel anticipates the need for at trial. Here, the comments of McCullough’s counsel at trial demonstrate that he knew of Sobek as a potential witness, and that he anticipated using Sobek at trial. Thus, Sobek was a known and anticipated rebuttal witness.
*180
McCullough also argues that she was under no duty to supplement her answers to interrogatories because a pre-trial order had been entered. Clearly, had no pre-trial order been entered here, Indiana Trial Rule 26(E)(1) would have required McCullough to supplement her responses to Interrogatories 19, 20, and 21. However, McCullough is correct that the pre-trial order, once entered, controls, and any required disclosure revolves around interpretation of and compliance with the pre-trial order. Ind. Trial Rule 16;
Whisman v. Fawcett
(1984), Ind.,
Even so, the pre-trial order did require disclosure of witnesses, and we find the fact that the order did not refer specifically to rebuttal witnesses of no moment. The pre-trial order was sufficient to have required McCullough to include Sobek’s name on her witness list. 2
Proper Rebuttal Testimony
We are not persuaded by the defendants’ argument that McCullough was obligated to present Sobek in her case in chief. “Rebuttal evidence is evidence which tends to explain, contradict, or disprove an adversary’s evidence.”
Watkins v. State
(1988), Ind.,
Discretion
Finally, defendants contend that, contrary to the conclusion of the majority of the Court of Appeals, exclusion of Sobek’s testimony was not an abuse of the trial court’s discretion. We have often stated that appropriate sanctions for failure to comply with a trial court’s order concerning discovery is a matter committed to the sound discretion of the trial court. Ind. Trial Rule 37;
Patel v. State
(1989), Ind.,
Had the rule concerning disclosure of rebuttal witnesses been clearly established in Indiana, the trial court could properly have excluded Sobek’s testimony. Several factors convince us that under these circumstances, however, exclusion of Sobek was too harsh a penalty. First, as discussed above, the case law requiring disclosure of rebuttal witnesses was not clear. Second, we note that nondisclosure of rebuttal witnesses has been a tradition among Indiana trial lawyers. These observations are confirmed by the fact that two of the three members of the panel of the Court of Appeals below agreed that rebuttal witnesses need not be disclosed. Therefore, even though the trial court was enforcing the rule that we announce today, it would be unfair to hold McCullough responsible- for failing to predict how this Court would resolve the ambiguity in Indiana’s case law. Because Sobek’s testimony, if believed by the jury, would likely have produced a different result, McCullough is entitled to a new trial.
Conclusion
Accordingly, we now grant transfer, vacate the opinion of the Court of Appeals, reverse the trial court, and grant a new trial for McCullough.
Notes
. Relying on
Cua v. Ramos
(1982), Ind.,
. We note that with regard to supplementation of answers to interrogatories, the majority of the Court of Appeals held that McCullough would not have been required to identify Sobek because he was a consultant whose opinions would not have to be disclosed under Trial Rule 26(B)(4)(b). We need not decide whether, at some particular time before trial, Sobek’s opinions would have been discoverable. We address this point only to note that had McCullough been required to supplement her answers to interrogatories, then Trial Rules 26 and 33 required McCullough either to identify Sobek or to object to providing the information requested in defendants’ interrogatories 19, 20, or 21. The nondisclosure provision contemplated by Trial Rule 26 concerning consultants is not self-executing. In response to a proper discovery request which otherwise would elicit the identity or opinions of a consultant, McCullough would be required to provide the information, or make a prima facie showing that the requested information was protected from disclosure.
