Cumulative Credibility Defects and Nigerian Citizenship by Descent in Immigration Proceedings

A. The Appellate Framework: Deference Rather Than Reweighing

The court’s analysis began with the limited nature of appellate review. An adverse credibility determination is reviewed for substantial evidence. The reviewing court does not decide whether it would have believed the applicant in the first instance; it asks whether the record compels a reasonable adjudicator to reach the opposite conclusion.

This distinction explains the court’s willingness to acknowledge innocent explanations for some discrepancies while nevertheless affirming. A plausible alternative reading of the evidence is not enough to overturn the agency’s finding.

Precedents cited

• Slyusar v. Holder, 740 F.3d 1068 (6th Cir. 2014): This was a central authority. It supplied the substantial-evidence standard, the requirement that a contrary conclusion be compelled, and the principle that credibility defects can defeat protection claims dependent on the applicant’s account. It also supported considering even very small inaccuracies.
• Marku v. Ashcroft, 380 F.3d 982 (6th Cir. 2004): Quoted through Slyusar v. Holder, this decision supplied the formulation that agency findings must rest on reasonable, substantial, and probative evidence considered across the whole record. Its role was to anchor deference in evidentiary support, not mere acceptance of an IJ’s conclusions.
• Masiko v. Holder, 562 F. App’x 469 (6th Cir. 2014): The court used this decision to emphasize the “substantial leeway” afforded IJs in making credibility judgments. That leeway mattered because the IJ directly observed Tsi’s manner of testifying.
• Zhao v. Holder, 569 F.3d 238 (6th Cir. 2009): This case identified the agency decision under review. Because the BIA adopted the IJ’s reasoning and supplemented it, the court reviewed the IJ’s decision together with the BIA’s additions.
• Ka v. Gonzales, 236 F. App’x 189 (6th Cir. 2007), and Mapouya v. Gonzales, 487 F.3d 396 (6th Cir. 2007): These authorities appeared through Zhao v. Holder. They reinforced that review encompasses the adopted IJ reasoning and the BIA’s additional comments, rather than treating the two agency decisions as unrelated rulings.

B. The Statutory Credibility Inquiry

Under 8 U.S.C. § 1158(b)(1)(B)(iii), credibility must be evaluated through the totality of the circumstances and all relevant factors. Those factors include demeanor, candor, responsiveness, plausibility, consistency, and inaccuracies or falsehoods.

The REAL ID Act’s critical contribution is that an inconsistency need not go “to the heart of the applicant’s claim.” An IJ may therefore consider discrepancies about peripheral matters. Nevertheless, the court’s analysis remained cumulative: it did not announce that every immaterial error automatically establishes dishonesty.

El-Moussa v. Holder, 569 F.3d 250 (6th Cir. 2009), established that these credibility instructions apply across asylum, withholding of removal, and CAT claims. That authority allowed the court to use a common credibility framework while recognizing that the underlying forms of protection remain legally distinct.

C. Demeanor and the Apparent Use of Written Material

The IJ identified several features of Tsi’s testimony that suggested he might be reading rather than recounting events from memory. She observed arm movements consistent with operating a computer mouse, eyes tracking a screen, avoidance of the camera, and a flat delivery even while describing traumatic events.

The transcript also recorded repeated requests that Tsi speak more clearly, slow down, raise his voice, and look at the camera. His conduct persisted after these instructions. The court treated those contemporaneous observations as record support for the IJ’s concern that he was controlling his presentation rather than responding naturally.

Precedents cited

• Mohamedene v. Lynch, 620 F. App’x 475 (6th Cir. 2015): This decision supported considering whether repeated questions were necessary to obtain answers and whether an applicant appeared to be “controlling the response rather than being responsive.” It supplied the closest analogy for the court’s treatment of Tsi’s hearing behavior.
• J-Y-C-, 24 I & N Dec. 260 (B.I.A. 2007): This administrative precedent endorsed a commonsense approach to credibility. The court invoked it when rejecting the argument that the IJ’s interpretation of body language necessarily amounted to unsupported speculation.

The reasoning has an important limit. The court upheld specific, recorded observations as one part of a broader evidentiary assessment. It did not establish that looking away from a camera, speaking quietly, or showing little emotion independently proves fabrication. Those behaviors can have other explanations; the appellate question was whether the record compelled rejection of the IJ’s interpretation.

D. The Cumulative Force of Six Discrepancies

The court reviewed six categories of inconsistencies or omissions identified by the agency:

1. “Ghost town” closures: Tsi described closing his shop for two days, rather than the single day identified in his applications.
2. Food in detention: His description expanded from banana or bread to include poorly cooked rice and beans.
3. Residence: He testified that he lived with his uncle for almost a year after his 2021 arrest, a detail absent from his original statement.
4. Education: He gave 2018 rather than 2019 as his high-school graduation year.
5. Release from detention: His accounts referred both to bribing officers and to others sneaking him out.
6. Injuries: His description of being beaten expanded from beneath his legs to include his stomach.

Some of these matters involved added details or omissions rather than obvious, irreconcilable contradictions. The court nevertheless accepted the agency’s cumulative assessment. It expressly acknowledged that forgetting a prison meal after a beating, or misstating a graduation year, might be understandable. Its conclusion was narrower than a finding that each discrepancy independently justified disbelief: taken together, and alongside demeanor and corroboration concerns, they did not compel a finding of credibility.

Precedents cited

• Akmatov v. Barr, 799 F. App’x 897 (6th Cir. 2020): This decision connected the cumulative significance of minor discrepancies with the deferential appellate standard. It supported evaluating the pattern rather than isolating each mistake.
• Yu v. Ashcroft, 364 F.3d 700 (6th Cir. 2004): Quoted through Akmatov v. Barr, this pre-REAL ID Act case recognized that minor date inconsistencies, although inadequate alone in some circumstances, could cumulatively support other credibility concerns. The court used it to show that cumulative assessment predated the statute’s broader authorization.
• Pilica v. Ashcroft, 388 F.3d 941 (6th Cir. 2004): This case supplied the reasonable-adjudicator formulation through Akmatov v. Barr. It also supported the later discussion of corroboration through Dong v. Holder.
• Rivas- Dubou v. Garland, No. 21-3347, 2022 WL 1073721 (6th Cir. Apr. 11, 2022): Quoting Slyusar v. Holder, this decision reinforced that even a de minimis inaccuracy may support an adverse credibility determination. Its significance was permissive, not automatic: a small error may contribute to the overall judgment.

E. Corroboration and the Limits of an Adverse Credibility Finding

The court did not treat disbelief of Tsi’s testimony as making all other evidence irrelevant. Independent evidence could have rehabilitated his account or established eligibility without relying on it. The problem was that the submitted evidence did neither.

Tsi supplied no medical records substantiating his own alleged injuries and presented no testimony from his sister, who lived in the United States. His mother’s medical book raised additional concerns: it contained a birth date inconsistent with other documents and described a stray-bullet injury rather than the point-blank shooting suggested by his testimony.

These findings also explain why the CAT claim failed. Although the court used broad language about the effect of adverse credibility findings, its operative reasoning depended on the absence of sufficient independent persuasive evidence. The opinion should not be read as establishing that an adverse credibility finding invariably defeats a CAT claim regardless of other proof.

Precedents cited

• Dong v. Holder, 345 F. App’x 965 (6th Cir. 2009): This decision recognized that corroboration can rehabilitate discredited testimony or independently satisfy the applicant’s burden. It prevented the credibility ruling from becoming the end of the evidentiary inquiry.
• Arias-Hernandez v. Sessions, 685 F. App’x 372 (6th Cir. 2017): Alongside Dong v. Holder, this authority illustrated useful forms of corroboration, including medical documentation, police records, and witness testimony. These were examples of supporting evidence, not a universal documentary checklist.
• Perlaska v. Holder, 361 F. App’x 655 (6th Cir. 2010): Cited through Slyusar v. Holder, this decision supported the proposition that adverse credibility can be fatal to asylum and removal-relief claims dependent on the rejected account.
• Luna-Romero v. Barr, 949 F.3d 292 (6th Cir. 2020): This decision extended the practical significance of credibility to CAT protection, explaining that an adverse finding is “usually fatal” across the three forms of protection.
• Rubio-Mauricio v. Barr, 782 F. App’x 444 (6th Cir. 2019): Quoted through Luna-Romero v. Barr, it supplied that “usually fatal” formulation. The qualification matters because independent evidence may still establish a claim.
• Korir v. Sessions, 700 F. App’x 514 (6th Cir. 2017): This authority most clearly expressed the controlling combination: an adverse credibility finding plus no independent persuasive evidence necessarily disposes of the application. It supported declining to reach Tsi’s remaining merits arguments.

F. Nigerian Citizenship: Separating Historical Facts from Legal Consequences

The citizenship issue required two distinct inquiries. First, what did the evidence establish about Tsi’s parentage? Second, what legal consequence did Nigerian law attach to those facts?

The court reviewed the underlying factual findings for substantial evidence. Tsi testified that his father and grandparents were Nigerian, and his application listed Nigeria as his father’s country of birth. The court found adequate support for the agency’s parentage findings.

The broader credibility ruling did not prevent the agency from relying on these specific statements. The opinion thus illustrates that rejecting an applicant’s persecution narrative does not necessarily require disregarding every statement he makes. The court did not, however, develop a separate general doctrine governing selective reliance on testimony.

The legal question received de novo review. Article 25 of the Nigerian Constitution provides that a person born outside Nigeria is a citizen by birth if either parent is Nigerian. The quoted provision imposed no additional qualification relevant to Tsi’s argument. Accordingly, the court rejected his contention that his father’s status could not establish his own citizenship automatically.

The opinion also cited Article 28 in explaining that Tsi’s Cameroonian citizenship did not deprive him of the Nigerian citizenship at issue. This was an application of the constitutional provisions to his circumstances, not a comprehensive examination of every category of Nigerian dual nationality.

Precedents cited

• Perez-Hernandez v. Blanche, 184 F.4th 520 (6th Cir. 2026): This decision supplied the general distinction between de novo review of legal determinations and substantial-evidence review of factual findings.
• Tista-Ruiz de Ajualip v. Garland, 114 F.4th 487 (6th Cir. 2024): Cited through Perez-Hernandez v. Blanche, it supported that same division of appellate responsibility.
• Menghistab v. Garland, 37 F.4th 1240 (7th Cir. 2022): This out-of-circuit authority applied the distinction specifically to nationality: citizenship is a legal determination, while the facts underlying it receive deferential review. It directly structured the court’s two-stage analysis.
• Mazariegos-Rodas v. Garland, 122 F.4th 655 (6th Cir. 2024): Together with 8 U.S.C. § 1252(d)(1), this decision supported declining to consider Tsi’s unexhausted challenge to removal to Nigeria. The court distinguished that challenge from the citizenship determination properly presented for review.

Although DHS initially suggested that Nigerian citizenship could affect asylum eligibility, the court did not decide a broader rule governing asylum claims by dual nationals. The protection claims had already failed on credibility and evidentiary grounds. Likewise, the court did not decide the separately unexhausted merits of selecting Nigeria as the removal destination.