Art. 702. Testimony by experts
A. 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 the proponent demonstrates
to the court that it is more likely than not that:
(1) 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;
(2) The testimony is based on sufficient facts or data;
(3) The testimony is the product of reliable principles and methods; and
(4) The expert's opinion reflects a reliable application of the principles and methods
to the facts of the case.
B. This Article shall also govern expert witnesses on the issue of memory and
eyewitness identification. In a criminal case, if a party seeks to offer the testimony of a
memory and eyewitness identification expert under this Article, such expert testimony may
be considered for admission only if all provisions of Paragraph A of this Article are satisfied.
A memory and eyewitness identification expert's testimony may not be admitted under this
Article if there is physical or scientific evidence that corroborates the eyewitness
identification of the defendant. An expert's testimony admitted under this Paragraph shall
not offer an opinion as to whether a witness's memory or eyewitness identification is
accurate.
Acts 1988, No. 515, §1, eff. Jan. 1, 1989; Acts 2014, No. 630, §1; Acts 2019, No.
115, §1, eff. June 5, 2019; Acts 2024, No. 88, §1.
NOTE: No changes in law or result in a ruling on evidence admissibility shall be
presumed or is intended by the Legislature of Louisiana by the passage of Acts 2014,
No. 630.