United States v. Oscar Chavez-Diaz, 949 F.3d 1202

Background

Chavez‑Diaz, a Mexican national, was charged with misdemeanor illegal entry under 8 U.S.C. § 1325 after Border Patrol apprehension in the Southern District of California.
The Southern District used an expedited § 1325 calendar offering most defendants a time‑served plea recommendation; group hearings and certain practices (shackling, meetings in a converted garage, alleged presentment delays) prompted defense objections.
At a magistrate‑judge plea hearing the day after arrest, Chavez‑Diaz objected on equal protection and due process grounds but pleaded guilty unconditionally (declining the government’s written plea offer) after counsel stated he was “not waiving his appellate rights.”
The magistrate accepted the plea and sentenced Chavez‑Diaz to time served; Chavez‑Diaz then appealed to the district court under 18 U.S.C. § 3402, raising the pre‑plea constitutional claims.
The district court permitted the appeal relying on Class v. United States; the government appealed to the Ninth Circuit arguing the unconditional plea waived the claims.
The Ninth Circuit reversed, holding Chavez‑Diaz waived the asserted ante‑plea constitutional claims and that the Menna‑Blackledge exception (as described in Class) did not apply.

Issues

Issue	Plaintiff's Argument	Defendant's Argument	Held
Whether an unconditional guilty plea waived Chavez‑Diaz’s ability to appeal pre‑plea due process and equal protection claims	Chavez‑Diaz: his challenges attack the constitutionality of proceedings, not factual guilt, so they survive the plea per Class	Govt: an unconditional plea waives all non‑jurisdictional antecedent claims (Tollett and Ninth Circuit precedent)	Waived: unconditional plea bars antecedent constitutional claims; Tollett and circuit precedents control
Whether the Menna‑Blackledge exception (as explained in Class) allows the appeal despite the unconditional plea	Chavez‑Diaz: because he challenges the constitutionality of the proceedings rather than factual guilt, Class permits review	Govt: Menna‑Blackledge applies only to claims that would extinguish the government’s power to prosecute (jurisdictional/statute invalid)	Not applicable: his claims would not preclude prosecution or conviction; they do not extinguish the government’s power to prosecute
Whether counsel’s statement that Chavez‑Diaz was “not waiving his appellate rights” rendered the plea unknowing or involuntary	Chavez‑Diaz: counsel’s remark created a reasonable expectation that all appellate rights were preserved	Govt: the statement concerned rights that can survive a plea and did not promise the ability to appeal antecedent constitutional claims	No: plea was knowing and voluntary; counsel’s remark did not preserve the antecedent claims

Key Cases Cited

Tollett v. Henderson, 411 U.S. 258 (a guilty plea waives independent claims of pre‑plea constitutional deprivation)
Class v. United States, 138 S. Ct. 798 (Menna‑Blackledge exception applies only when success would show the government lacked power to prosecute)
Menna v. New York, 423 U.S. 61 (double‑jeopardy claim that facially precludes prosecution not waived by guilty plea)
Blackledge v. Perry, 417 U.S. 21 (guilty plea does not waive claims that would bar being haled into court)
Broce v. United States, 488 U.S. 563 (explains waiver effect of plea and scope of Menna‑Blackledge exception)
United States v. Lopez‑Armenta, 400 F.3d 1173 (9th Cir.) (unconditional plea waives antecedent constitutional and nonjurisdictional errors)
United States v. Montilla, 870 F.2d 549 (9th Cir.) (guilty plea erases pre‑plea constitutional claims such as outrageous government conduct)