Page 43 - Civil Litigation

(ii) identify facts or data that the party’s attorney provided and that the expert consid-
ered in forming the opinions to be expressed; or

(iii)identify assumptions that the party’s attorney provided and that the expert relied
on in forming the opinions to be expressed.

(D) Expert Employed Only for Trial Preparation. Ordinarily, a party may not, by interrogato-
ries or deposition, discover facts known or opinions held by an expert who has been re-
tained or specially employed by another party in anticipation of litigation or to prepare
for trial and who is not expected to be called as a witness at trial. But a party may do so
only:

(i) as provided in Rule 35(b); or

(ii) on showing exceptional circumstances under which it is impracticable for the par-
ty to obtain facts or opinions on the same subject by other means.

(E) Payment. Unless manifest injustice would result, the court must require that the party
seeking discovery:

(i) pay the expert a reasonable fee for time spent in responding to discovery under
Rule 26(b)(4)(A) or (D); and

(ii) for discovery under (D), also pay the other party a fair portion of the fees and ex-
penses it reasonably incurred in obtaining the expert’s facts and opinions.

Federal Rules of Evidence

Rule 702. Testimony by Expert Witnesses

A witness who is qualified as an expert by knowledge, skill, experience, training, or education
may testify in the form of an opinion or otherwise if

(a) the expert’s scientific, technical, or other specialized knowledge will help the trier of fact
to understand the evidence or to determine a fact in issue;

(b) the testimony is based on sufficient facts or data;

(c) the testimony is the product of reliable principles and methods; and

(d) the expert has reliably applied the principles and methods to the facts of the case.

Rule 703. Bases of an Expert

An expert may base an opinion on facts or data in the case that the expert has been made aware
of or personally observed. If experts in the particular field would reasonably rely on those kinds
of facts or data in forming an opinion on the subject, they need not be admissible for the opinion
to be admitted. But if the facts or data would otherwise be inadmissible, the proponent of the
opinion may disclose them to the jury only if their probative value in helping the jury evaluate
the opinion substantially outweighs their prejudicial effect.

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