Unreported / Non-Citable
Background
Humberto Castillo Hernandez, a federal immigration detainee, filed a petition for a writ of habeas corpus under 28 U.S.C. § 2241 in the Eastern District of California challenging his immigration detention. The respondent is the warden of the Central Valley Annex. The case was referred to a magistrate judge by operation of Local Rule 302 and 28 U.S.C. § 636(b)(1), so the document is a set of findings and recommendations to the assigned district judge, not a final order of the court.
The respondent moved to dismiss (ECF No. 19). According to the magistrate judge's review of the record, the petitioner was granted relief in immigration court and was later released from the respondent's custody on October 16, 2026. The findings cite the motion for that release. They do not describe the kind of relief the immigration court granted, the legal basis for the original detention, or the specific claims in the petition, and they do not address the merits of any of those claims.
The Court’s Holding
The magistrate judge recommends that the motion to dismiss be granted and that the habeas application be dismissed as moot based on the petitioner's release from custody. The reasoning is brief. Because the release moots the pending challenge to immigration detention, the court has no remaining effective relief to give. The findings rely on Picrin-Peron v. Rison, 930 F.2d 773, 775–76 (9th Cir. 1991), which they describe as treating a habeas petition challenging immigration detention as moot upon the petitioner's release because the court could no longer grant effective relief.
A footnote contrasts this record with other cases in which the government releases a petitioner in response to the filing of a habeas petition and does not disclaim authority to redetain that petitioner. In those cases, the footnote says, voluntary cessation principles may be implicated. The magistrate judge does not apply that doctrine here and makes no finding about the government's redetention authority. The footnote only marks the difference from a record in which release followed relief granted in immigration court.
The findings make three recommendations: grant the motion to dismiss, dismiss the application as moot based on the release, and direct the Clerk to enter judgment for the respondent and close the case. These are recommendations only. They go to the assigned district judge, and any party may file written objections within fourteen days after service. The findings warn that failing to object may waive the right to appeal the district court's order, citing Martinez v. Ylst, 951 F.2d 1153 (9th Cir. 1991). The document does not say whether the dismissal would be with or without prejudice.
Key Takeaways
- Under the Ninth Circuit authority cited, a § 2241 petition challenging immigration detention is moot once the petitioner is released and the court can no longer grant effective relief.
- The release here followed relief granted in immigration court, and the magistrate judge treated that record as contrasting with cases where release comes in response to a habeas filing.
- Where the government releases a petitioner after a habeas filing and does not disclaim authority to redetain, the footnote indicates that voluntary cessation principles may be implicated, so mootness is not automatic in that setting.
- This is a recommendation, not a ruling by the district judge, and the case is not closed unless the district judge adopts it and judgment is entered.
- Objections are due within fourteen days of service, and failing to file them may waive the right to appeal the district court's order.
Why It Matters
This is a non-precedential magistrate judge recommendation, and its value is mainly illustrative. It shows how a court in the Eastern District of California applies Picrin-Peron when a detainee is released while a § 2241 petition is pending. Its practical point is the footnote's distinction between a release that follows relief in immigration court and a release prompted by the habeas filing where the government keeps its redetention authority.
Several matters remain open. The district judge has not yet decided whether to adopt the recommendations, and no objections appear in the materials. The findings do not decide whether the petitioner could be detained again, what the immigration court relief means for his future custody, or whether the dismissal would be with prejudice. Counsel facing a mootness motion after a release should note that the recommendation depends on the record described in the findings and on the footnote's contrast with voluntary cessation cases.