In re Application for a Search Warrant
236 F. Supp. 3d 1066
N.D. Ill.2017Background
- Government obtained a warrant to search a residence for evidence of child pornography and to seize electronic storage media for off-site forensic analysis.
- Warrant application sought additional authority to compel any person present at the premises to place a fingerprint/thumbprint on any Apple device’s Touch ID to unlock it.
- Probable cause to search the premises for child pornography was found sufficient, but the application lacked specifics tying particular persons or particular Apple devices at the premises to the alleged criminal activity.
- The affidavit contained dated boilerplate about technology and omitted discussion of wireless access and other means by which non-residents might use the premises’ internet service.
- The court viewed the forced fingerprint request as broad (any person present; any Apple device) and unsupported by an individualized showing connecting persons to the devices or to criminal conduct.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Whether officers may compel fingerprints/thumbprints from any person at the premises to unlock Apple devices during a warrant execution | No Fourth Amendment problem in taking fingerprints; fingerprinting is a non-search physical act for ID (Sechrist/Wade) | Compelled fingerprinting here is an unlawful seizure/search because warrant lacks particularized probable cause linking persons/devices; Summers detentions limited to residents; context matters | Denied: warrant does not establish sufficient probable cause to compel fingerprints of any person present to unlock unspecified Apple devices |
| Whether compelled biometric unlocking implicates the Fifth Amendment privilege against self-incrimination | Fingerprint is non-testimonial physical evidence, so no Fifth Amendment protection | Forcing a fingerprint to unlock a device can be testimonial: it communicates control, prior access, and a link between person and device/content; not equivalent to routine ID | Denied: Fifth Amendment concerns apply here because forcing a fingerprint to unlock a device can compel use of the person’s mind and implicitly communicate facts; government did not show "foregone conclusion" |
| Whether the foregone-conclusion doctrine applies such that compelled unlocking is non-testimonial | Government: existence/control/authenticity of device/data are known, so production is non-testimonial | Court: government lacked reasonable particularity about existence/location of incriminating files or which devices at the premises are linked; cannot invoke foregone-conclusion | Not established: foregone-conclusion doctrine not satisfied on these facts |
| Whether blanket, standardized warrant language authorizing forced biometric unlocking is permissible | Government sought to use a standardized clause in all warrants to compel fingerprints | Court: such requests require a fact-specific showing; standard form overbroad without individualized facts connecting persons to devices | Not permissible here; may be permissible with stronger individualized proof (post-search evidence may change posture) |
Key Cases Cited
- Sechrist v. United States, 640 F.2d 81 (7th Cir. 1981) (analyzing Fourth Amendment aspects of compelled fingerprinting and detention)
- United States v. Dionisio, 410 U.S. 1 (1973) (distinguishing physical exemplars from testimonial evidence)
- Davis v. Mississippi, 394 U.S. 721 (1969) (Fourth Amendment concerns about seizure to obtain fingerprints)
- Michigan v. Summers, 452 U.S. 692 (1981) (authority to detain occupants during execution of search warrant)
- Ybarra v. Illinois, 444 U.S. 85 (1979) (limits on searching persons merely present near a search target)
- Maryland v. Buie, 494 U.S. 325 (1990) (scope of protective sweeps incident to arrest/search)
- Muehler v. Mena, 544 U.S. 93 (2005) (categorical authority to detain incident to a search)
- United States v. Guevara-Martinez, 262 F.3d 751 (8th Cir. 2001) (context of fingerprinting and exclusionary rule when taken after unlawful detention)
- Fisher v. United States, 425 U.S. 391 (1976) (foregone-conclusion doctrine for production of documents)
- United States v. Hubbell, 530 U.S. 27 (2000) (limits on foregone-conclusion where government lacks prior knowledge)
- In re Grand Jury Subpoena Duces Tecum (Doe), 670 F.3d 1335 (11th Cir. 2012) (decryption compelled may be testimonial; act-of-production analysis)
- Riley v. California, 573 U.S. 373 (2014) (cell phones as repositories of extensive private data informing Fourth Amendment analysis)