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No. 10354094
United States Court of Appeals for the Ninth Circuit
Martinez Santoyo v. Boyden
No. 10354094 · Decided March 11, 2025
No. 10354094·Ninth Circuit · 2025·
FlawFinder last updated this page Apr. 2, 2026
Case Details
Court
United States Court of Appeals for the Ninth Circuit
Decided
March 11, 2025
Citation
No. 10354094
Disposition
See opinion text.
Full Opinion
NOT FOR PUBLICATION FILED
UNITED STATES COURT OF APPEALS MAR 11 2025
MOLLY C. DWYER, CLERK
U.S. COURT OF APPEALS
FOR THE NINTH CIRCUIT
JOSE TRINIDAD MARTINEZ No. 24-1967
SANTOYO, D.C. No.
2:23-cv-00447-DJC-JDP
Petitioner - Appellant,
v. MEMORANDUM*
LASHA BOYDEN, U.S. Marshal for the
Eastern District of CA; MINDY
MCQUIVEY, Chief, U.S. Probation Office
for the Eastern District of CA; MERRICK
B. GARLAND, Attorney
General; ANTONY J. BLINKEN,
Respondents - Appellees.
Appeal from the United States District Court
for the Eastern District of California
Daniel J. Calabretta, District Court, Presiding
Argued and Submitted February 10, 2025
San Francisco, California
Before: OWENS, VANDYKE, and JOHNSTONE, Circuit Judges.
Jose Trinidad Martinez Santoyo appeals from the district court’s denial of
his petition for a writ of habeas corpus, which challenged the extradition court’s
*
This disposition is not appropriate for publication and is not precedent
except as provided by Ninth Circuit Rule 36-3.
order certifying his extradition to Mexico. He argues that the district court erred in
upholding the extradition court’s 1) finding of probable cause as to the alleged
offense underlying Mexico’s request for extradition—intentional aggravated
homicide with advantage; 2) exclusion of a forensic report showing the decedent
had gunshot residue on one of his hands; and 3) denial of his motion to compel
information the United States may have from a prior, unrelated criminal
proceeding against the decedent.1 As the parties are familiar with the facts, we do
not recount them here. We review the district court’s denial of the habeas petition
de novo. Rana v. Jenkins, 113 F.4th 1058, 1063 (9th Cir. 2024). We affirm.
1. “We must affirm the [extradition court’s] probable cause finding so
long as ‘there was any evidence warranting the finding that there was reasonable
ground to believe the accused guilty.’” Id. at 1070 (citation omitted). Three
eyewitnesses saw Santoyo shoot the decedent twice in the head with a pistol.
Officers found two wounds and two bullet casings consistent with their statements.
The witnesses did not mention seeing the decedent carry a weapon of any kind, and
details about the decedent’s personal belongings and the crime scene do not
mention a weapon. The autopsy report is also consistent with the witnesses’
1
Santoyo also argues that the district court erred in holding that the “lapse of time”
provision in the Extradition Treaty between the United States and Mexico does not
incorporate the Sixth Amendment Speedy Trial Clause. We address this argument
in a concurrently filed opinion, in which we affirm.
2 24-1967
statements and investigation. Thus, there is competent evidence supporting the
extradition court’s finding of probable cause as to the charged crime, i.e., that
Santoyo shot and killed an unarmed individual. See Oen Yin-Choy v. Robinson,
858 F.2d 1400, 1407 (9th Cir. 1988) (“[Petitioner’s] appeal . . . must fail if there is
‘any evidence of probable cause.’” (citation omitted)).
2. The extradition court “has broad discretion to determine the
admissibility of the evidence before it.” Santos v. Thomas, 830 F.3d 987, 1007
(9th Cir. 2016). While explanatory evidence that “explains away or completely
obliterates probable cause” may be admitted, contradictory evidence, which
“merely controverts the existence of probable cause, or raises a defense,” is
inadmissible. Id. at 992 (citation omitted). Here, the forensic report does not
obliterate probable cause. Rather, it is contradictory evidence which, at most,
allows Santoyo to raise a defense. Thus, the extradition court did not abuse its
discretion in declining to admit the forensic report.
3. “[D]iscovery in an international extradition hearing is limited and lies
within the discretion of the magistrate.” Prasoprat v. Benov, 421 F.3d 1009, 1014
(9th Cir. 2005) (citation omitted). “[T]he principles set forth in [Brady v.
Maryland, 373 U.S. 83 (1963)] are not applicable . . . in an international
extradition case.” Merino v. U.S. Marshal, 326 F.2d 5, 13 (9th Cir. 1963). And an
3 24-1967
extradition hearing is “not the occasion for an adjudication of guilt or innocence.”
Oen Yin-Choy, 858 F.2d at 1406 (citation omitted).
Here, unlike in Demjanjuk v. Petrovsky, 10 F.3d 338 (6th Cir. 1993), on
which Santoyo relies, the government did not conduct its own investigation of the
offense underlying the request for extradition. See In re Extradition of Drayer, 190
F.3d 410, 414 (6th Cir. 1999) (narrowing Demjanjuk and distinguishing it on
similar grounds). Moreover, Santoyo does not explain how the information he
seeks from an unrelated criminal proceeding against the decedent is relevant. And
any such information would attack the credibility of the witnesses and be
contradictory to Mexico’s evidence, which would render the evidence
inadmissible. See Santos, 830 F.3d at 993 (an accused may not introduce “facts
contradicting the government’s proof[] or evidence of defenses”); see also
Prasoprat, 421 F.3d at 1015 (distinguishing Demjanjuk by noting the evidence
sought by Demjanjuk “related to whether he was in fact the individual who had
committed the extraditable offense and thus concerned the probable cause
determination”). Therefore, the extradition court did not abuse its discretion in
denying the motion.
For all these reasons we affirm.
AFFIRMED.
4 24-1967
Plain English Summary
NOT FOR PUBLICATION FILED UNITED STATES COURT OF APPEALS MAR 11 2025 MOLLY C.
Key Points
01NOT FOR PUBLICATION FILED UNITED STATES COURT OF APPEALS MAR 11 2025 MOLLY C.
02COURT OF APPEALS FOR THE NINTH CIRCUIT JOSE TRINIDAD MARTINEZ No.
03Marshal for the Eastern District of CA; MINDY MCQUIVEY, Chief, U.S.
04Calabretta, District Court, Presiding Argued and Submitted February 10, 2025 San Francisco, California Before: OWENS, VANDYKE, and JOHNSTONE, Circuit Judges.
Frequently Asked Questions
NOT FOR PUBLICATION FILED UNITED STATES COURT OF APPEALS MAR 11 2025 MOLLY C.
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