Cooley Wins Major Fourth Circuit Victory for Pro Bono Client Trokon Diahn

Why It Matters

The ruling clarifies procedural standards for immigration cases, bolstering protections for unrepresented detainees and setting a precedent that could reshape removal proceedings nationwide.

Key Takeaways

• Fourth Circuit vacated Diahn’s removal order, remanding case.
• Exhaustion judged by substance, not formal legal language.
• Judges must actively build record for detained, pro se respondents.
• Decision flags due‑process risks from inadequate notice.

Pulse Analysis

The Fourth Circuit’s May 5, 2026 decision in *Trokon Diahn v. Todd Blanche* underscores the evolving landscape of U.S. immigration law. Diahn, a refugee‑born young adult who grew up in Philadelphia, faced removal after a criminal conviction despite believing he held lawful permanent resident status. Cooley’s pro bono team argued that the Board of Immigration Appeals had been properly notified of his claims, even though his brief lacked traditional legal phrasing. This case illustrates how nuanced procedural arguments can determine life‑changing outcomes for vulnerable immigrants.

At the heart of the ruling is the court’s interpretation of administrative exhaustion. Rather than requiring strict legal formality, the Fourth Circuit held that exhaustion is satisfied when the agency receives sufficient substantive notice of the claimant’s arguments. Moreover, the opinion reaffirmed an affirmative duty for immigration judges to construct a complete administrative record, especially when the respondent is detained and lacks counsel. Failure to do so is deemed presumptively prejudicial, reinforcing due‑process safeguards that have often been overlooked in expedited removal settings.

The broader implications extend beyond Diahn’s individual case. By emphasizing substance over form and mandating proactive record‑building, the decision sets a persuasive precedent for other circuits handling similar pro se detainee matters. Law firms and immigration practitioners must now scrutinize filing practices and ensure that agencies receive clear, substantive claims, even from unrepresented clients. Policymakers may also feel pressure to codify these procedural protections, potentially leading to reforms that enhance fairness in removal proceedings across the immigration system.