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Case 1:20-cr-00330-PAE Document 424 Filed 11/08/21 Page5of41
PRELIMINARY STATEMENT
The Government respectfully moves to preclude certain opinions from Dr. Park Dietz and
Dr. Elizabeth Loftus. Rather than focus narrowly on reliable opinions that would be relevant to
issues in this case, the defendant proposes to have Dr. Dietz and Dr. Loftus testify broadly about
a wide variety of topics, from testimony about various psychological disorders to testimony
regarding the generation of false memories in laboratory settings, that are not helpful to the jury.
Many of those opinions are also unreliable, squarely within the ken of the average juror, or would
invade the province of the Court and the jury if offered.
To the extent Dr. Rocchio is permitted to testify on her opinions, the Court should admit
reliable opinions on the same topics by defense experts. But the defense’s expert notice for Dr.
Dietz and Dr. Loftus is far more expansive, and some of the defense’s responsive opinions are not
reliable. The Court should preclude many of their opinions.
1. THE COURT SHOULD PRECLUDE CERTAIN OPINIONS FROM DR. DIETZ
A. Background
As described in the defense expert notice, attached as Exhibit A!, the defense offers the
opinions of Dr. Dietz, an expert psychiatrist, both in response to the Government’s expert Dr. Lisa
Rocchio and on several other subjects.
' The Government moves to file a redacted version of Exhibit A and to seal Exhibit B. The
proposed redactions are consistent with the three-part test articulated by the Second Circuit in
Lugosch v. Pyramid Co. of Onondaga, 435 F.3d 110 (2d Cir. 2006). Although these exhibits are
judicial documents subject to the common law presumption of access, the proposed redactions are
narrowly tailored to protect the privacy interests of victims, including victims who have not been
publicly identified, and who are a subject of the Court’s order granting the motion to let certain
victims and witnesses testify under pseudonyms, and third parties. Because the Government has
already moved to file a redacted version of Exhibit A (see Dkt. No. 418), the same version is
attached to this motion.
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| Filename | DOJ-OGR-00006216.jpg |
| File Size | 750.0 KB |
| OCR Confidence | 95.0% |
| Has Readable Text | Yes |
| Text Length | 2,176 characters |
| Indexed | 2026-02-03 17:08:28.135908 |