109 N.E.3d 418
Ind. Ct. App.2018Background
- In July 2017 Seo reported an alleged rape; police later viewed and forensically downloaded her iPhone with her consent, then shifted investigation to Seo for stalking/harassment of D.S.
- Seo was charged with multiple crimes; police seized an iPhone 7 Plus from her arrest and later obtained a warrant to search the phone and an accompanying order compelling Seo to unlock it (by passcode, biometric, or otherwise).
- Seo refused to unlock the phone on Fifth Amendment grounds; the trial court held her in contempt and ordered incarceration unless she unlocked the phone or disabled/changed the passcode.
- On appeal the Indiana Court of Appeals reviewed whether compelling Seo to unlock/decrypt the phone is testimonial (Fifth Amendment) and whether the "foregone conclusion" doctrine permits compulsion.
- The court concluded (majority) that forcing Seo to unlock/decrypt the phone is testimonial because it compels the contents of her mind (the passcode) and effectively recreates encrypted files; the State had not described with reasonable particularity the files it sought, so the foregone conclusion exception did not apply.
- The court reversed the contempt order and remanded, giving guidance that prosecutors must identify with reasonable particularity the discrete digital evidence and attempt third-party avenues before compelling decryption in non-emergency cases.
Issues
| Issue | Plaintiff's Argument (State) | Defendant's Argument (Seo) | Held |
|---|---|---|---|
| Whether compelling Seo to unlock/decrypt her phone violates the Fifth Amendment | Compulsion was non-testimonial because it merely required Seo to produce an unlocked phone (not reveal the passcode); unlocking is akin to surrendering a key (foregone conclusion) | Unlocking or inputting the passcode is testimonial because the passcode is the product of the mind and unlocking recreates encrypted files (testimony) | Majority: Compelling unlocking/decryption is testimonial; Fifth Amendment protects Seo from being forced to unlock the phone |
| Whether the foregone conclusion doctrine allows compulsion here | The State argued foregone conclusion applies because phone ownership and Seo's ability to unlock it are already known (so production adds little) | The State has not described with reasonable particularity the discrete files it seeks; compelling decryption would force recreation of unknown files, so foregone conclusion does not apply | Majority: Foregone conclusion inapplicable because State failed to show with reasonable particularity the specific files/evidence it seeks on the phone; warrant/order lacked sufficient specificity |
Key Cases Cited
- Riley v. California, 573 U.S. 373 (2014) (recognizing the unique privacy interests in modern cell phones and requiring careful Fourth Amendment analysis for phone searches)
- Fisher v. United States, 425 U.S. 391 (1976) (establishing that production of documents can be non-testimonial when existence, possession, and authenticity are a "foregone conclusion")
- United States v. Hubbell, 530 U.S. 27 (2000) (holding act of producing documents may be testimonial when government cannot describe with reasonable particularity the documents sought)
- Doe v. United States, 487 U.S. 201 (1988) (distinguishing surrender of a key from revealing a combination; discussing testimonial nature of revealing contents of the mind)
- Schmerber v. California, 384 U.S. 757 (1966) (physical characteristics and non-testimonial acts—e.g., fingerprints, blood samples—may be compelled)
- In re Grand Jury Subpoena Duces Tecum Dated March 25, 2011, 670 F.3d 1335 (11th Cir. 2012) (compelled decryption held testimonial; relied on mental effort required to decrypt and produce files)