317 F. Supp. 3d 523
D.C. Cir.2018Background
- Government sought a warrant to search a District of Columbia premises for evidence of violations of 18 U.S.C. § 1030 and to seize electronic devices found there ("Subject Devices").
- Warrant attachment sought prior court authorization to compel the suspected occupant (the "Subject") to provide biometric features (fingerprints, face, irises) to attempt to unlock Subject Devices found on the premises; it barred compelling others or asking the Subject to disclose passwords or identify which biometric would work.
- The Magistrate Judge appointed the Federal Public Defender as amicus to brief constitutional issues; the Court heard argument and granted the warrant, then issued this written opinion explaining the reasoning.
- The opinion analyzed Fourth Amendment search-and-seizure concerns (detention and compelling biometric use during a warrant execution) and Fifth Amendment self-incrimination concerns (whether compelled biometric unlocking is testimonial).
- The Court adopted a standard for compelled biometric unlocking during on-site execution of a search warrant: it may be compelled if (a) done with dispatch in the immediate vicinity of the premises, (b) there is reasonable suspicion the suspect committed the offense underlying the warrant, and (c) there is reasonable suspicion the suspect's biometric will unlock the device.
- The Court concluded compelled biometric unlocking in this context is not testimonial for Fifth Amendment purposes (analogy to physical evidence like fingerprints or blood), so the Fifth Amendment does not bar the compelled act described in the warrant.
Issues
| Issue | Plaintiff's Argument (Government) | Defendant's / Amicus Argument (Federal Public Defender) | Held |
|---|---|---|---|
| Fourth Amendment: May court authorize compelled biometric use to unlock devices during execution of a warrant? | Execution-methods are governed by Fourth Amendment "reasonableness"; prior authorization not necessary beyond a valid warrant. | Court should require a higher showing (e.g., probable cause that device belongs to suspect) before compelling biometrics. | Court: Authorized if executed with dispatch in immediate vicinity, and at time of compulsion government has reasonable suspicion of suspect's commission of the offense and that the biometric will unlock the device. |
| Fifth Amendment: Is compelled biometric unlocking "testimonial"? | Compelled biometric use is non-testimonial physical evidence (like fingerprints, voice exemplars), so Fifth Amendment does not bar it. | Compelled unlocking is akin to producing documents/combination and implicitly communicates control/possession; it is testimonial. | Court: Compelled biometric use is non-testimonial (analogous to surrendering a key, fingerprints, or blood); Fifth Amendment does not bar it. |
| Decryption argument: Does biometric unlocking constitute compelled decryption (testimonial) because it renders encrypted data readable? | Unlocking/decryption is performed by the device/software; the suspect does not use his mind to produce or assemble the contents, so it is non-testimonial. | Unlocking decrypts and "assembles" incriminating data, akin to producing documents; thus testimonial when it requires knowledge. | Court: Distinguishes cases that required a password (testimony) from biometric unlocking where the subject supplies only a physical trait; unlocking/decryption by the machine is not testimonial. |
| Particularity of warrant and scope limits | Warrant specified offense, place, and categories of data to be seized; devices limited to those reasonably capable of containing evidence. | Amicus argued general authorization to search devices may violate particularity requirement. | Court: Warrant sufficiently particularized; attachment and affidavit incorporated specifics and nexus to crime. |
Key Cases Cited
- Missouri v. McNeely, 569 U.S. 141 (warrant requirement and exigency discussion)
- Riley v. California, 573 U.S. 373 (2014) (cell-phone contents require warrant)
- Schmerber v. California, 384 U.S. 757 (1966) (compelled physical evidence non-testimonial)
- Davis v. Mississippi, 394 U.S. 721 (1969) (fingerprints taken during investigatory detention without probable cause suppressed)
- Hayes v. Florida, 470 U.S. 811 (1985) (fingerprinting after arrest without probable cause suppressed)
- Hubbell, United States v., 530 U.S. 27 (2000) (act of production doctrine; assembling documents testimonial)
- Doe v. United States (Doe II), 487 U.S. 201 (1988) (compelled signature/non-testimonial acts)
- Hiibel v. Sixth Judicial Dist. Ct. of Nev., Humboldt Cty., 542 U.S. 177 (2004) (reasonable-suspicion stops and testimonial analysis)
- United States v. Leon, 468 U.S. 897 (1984) (good-faith reliance on a warrant / exclusionary rule)
- United States v. Dionisio, 410 U.S. 1 (1973) (voice exemplars and physical evidence analysis)
- In re Application of the All Writs Act decisions referenced (e.g., Apple MacPro Computer) (support for court orders to assist warrant execution)