Shared Access Can Authorize Third-Party Consent to a Cell-Phone Search Despite Another Person’s Ownership

1. Introduction

In United States v. Antoine Cook, the Sixth Circuit upheld a warrantless cell-phone search because the defendant’s girlfriend possessed and used the phone under circumstances reasonably indicating shared access or control. The decision’s central proposition is that ownership does not exclusively determine who may authorize a search: another person’s demonstrated access and use can support valid third-party consent.

The court applied that principle to a phone belonging to Antoine C. Cook, a parolee whose girlfriend, identified as E.C., contacted his parole officer after Cook’s arrest for domestic violence. E.C. possessed the phone, knew its passcode, used it to communicate, and described it as her only means of communication. Cook also repeatedly called the phone from jail to reach her. She voluntarily handed it to an officer and supplied the passcode. The officers discovered incriminating images, searched the couple’s hotel room with E.C.’s consent, and later obtained a warrant for the phone.

Cook challenged the phone search primarily on the ground that his parole officers lacked the reasonable suspicion required under Ohio law. He also disputed E.C.’s authority to consent, questioned the phone’s seizure, alleged ineffective assistance of counsel, and asserted judicial bias. The appellate court affirmed without deciding whether Ohio’s parole-search provisions independently authorized the phone search.

The opinion principally extends an existing shared-access analysis to these particular facts rather than creating a categorical exception for searches of a romantic partner’s phone.

2. Background and Procedural History

The investigation

On May 1, 2024, E.C. called Officer John Zubick, Cook’s parole officer, from Cook’s phone. She reported that local officers had arrested Cook for domestic violence at a hotel. Zubick and Officer Ashley DiMarco went to the hotel, where E.C. explained the incident and said that she and Cook had used drugs the previous night.

While the officers spoke with E.C., Cook repeatedly called his phone from jail. E.C. answered one call, told Cook that she was with his parole officer, and ended the conversation. When DiMarco asked to examine the phone, E.C. willingly provided it and its passcode. DiMarco saw a video of a rifle magazine containing ammunition. Zubick subsequently found additional ammunition photographs and a video depicting Cook with firearms.

After Officer John Christie arrived, the officers obtained E.C.’s consent to search the hotel room. They discovered shotgun shells, firearm magazines, ammunition, cocaine, and methamphetamine. Christie later obtained a search warrant for the phone and located the hotel-room video during the warranted examination.

The criminal proceedings

A federal grand jury charged Cook with two drug-distribution offenses under 21 U.S.C. § 841(a)(1), involving methamphetamine and cocaine, and one count of possessing ammunition as a convicted felon under 18 U.S.C. § 922(g)(1).

Cook moved to suppress evidence obtained from the phone and the ensuing hotel-room search. He argued that the officers lacked the reasonable suspicion required by Ohio Revised Code § 2967.131(C)(1) and that E.C. lacked actual or apparent authority over his phone. The district court denied suppression based on the Ohio parole-search framework and Cook’s signed supervision condition permitting warrantless searches of his person, place, and things.

On the morning of trial, Cook discussed representing himself or obtaining replacement counsel. The district judge denied the request for new counsel, explaining that existing counsel was prepared to proceed. Cook then elected to continue with appointed counsel. A jury convicted him on all three counts.

3. Summary of the Opinion

• The initial phone search was constitutional. E.C.’s possession, use, knowledge of the passcode, and role as the person Cook was calling supported the officers’ reasonable understanding that she had joint access or control sufficient to consent.
• Cook’s ownership did not defeat that consent. A person other than the owner may possess sufficient authority over property to authorize its search.
• The Ohio parole-search issue remained undecided. Consent supplied an independent basis for affirmance, making it unnecessary to resolve the statutory reasonable-suspicion question.
• The seizure challenge failed under plain-error review. Cook had not preserved a distinct seizure objection, and the officers had discovered evidence supporting temporary retention of the phone pending a warrant.
• The ineffective-assistance claims were not decided on their merits. The appellate record was insufficient to evaluate counsel’s conduct and any resulting prejudice.
• The judicial-bias claim failed. The court found that the challenged rulings and comments, considered in context, did not establish bias or racial animus requiring recusal or reassignment.

The court affirmed the district court’s judgment.

4. Analysis of the Precedents Cited

A. Appellate review and affirmance on alternative grounds

United States v. Ickes, 922 F.3d 708 (6th Cir. 2019), and United States v. Quinney, 583 F.3d 891 (6th Cir. 2009)

These decisions supply the governing standards for reviewing suppression rulings: factual findings receive clear-error review, while legal conclusions receive de novo review. The distinction allowed the Sixth Circuit to assess independently the constitutional significance of the established circumstances surrounding E.C.’s access to the phone.

Abercrombie & Fitch Stores, Inc. v. Am. Eagle Outfitters, Inc., 280 F.3d 619 (6th Cir. 2002)

This case supports affirmance on any ground supported by the record when appellate review involves applying law to undisputed facts. It provided the procedural foundation for sustaining suppression’s denial on consent grounds rather than the district court’s parole-search rationale.

Lorillard Tobacco Co. v. Chester, Willcox & Saxbe, 546 F.3d 752 (6th Cir. 2008), and Dandridge v. Williams, 397 U.S. 471 (1970)

These authorities establish that a prevailing party may defend its judgment on grounds the trial court did not adopt or consider. Their importance is practical: affirmance did not require the appellate court to endorse the district court’s interpretation of Ohio parole law.

B. The constitutional foundation for third-party consent

United States v. Morgan, 435 F.3d 660 (6th Cir. 2006), and United States v. Matlock, 415 U.S. 164 (1974)

These cases establish that officers need neither a warrant nor probable cause to conduct a search authorized by a third party with the requisite authority. United States v. Matlock supplies the central concept of common authority: mutual use by people generally enjoying joint access or control for most purposes. The inquiry therefore concerns practical access and use, not simply whose name is associated with the property.

Schneckloth v. Bustamonte, 412 U.S. 218 (1973)

This decision supplies a separate requirement: consent must be freely and voluntarily given. Authority and voluntariness are distinct. A person with access cannot validate a search through coerced consent. Here, E.C.’s willing delivery of the phone and passcode supported the court’s treatment of her cooperation as voluntary.

United States v. Ayoub, 498 F.3d 532 (6th Cir. 2007)

Quoting United States v. Matlock, this case emphasizes that common authority does not arise merely from a property interest. It rests instead on mutual use and joint access or control. That principle also explains why Cook’s ownership did not necessarily exclude another person’s authority to consent.

C. Applying shared-access principles to electronic devices

United States v. Gardner, 887 F.3d 780 (6th Cir. 2018)

This was the closest and most influential precedent. It recognized that a person could, “by all reasonable appearances,” possess joint access or control over a boyfriend’s phone sufficient to authorize a search, even when officers knew the boyfriend owned it. Cook’s case presented comparable indicators: E.C. possessed the phone, knew its passcode, used it as her communication device, and voluntarily gave it to police.

The Sixth Circuit relied on this analogy to reject ownership as dispositive. The decisive issue was the apparent practical arrangement governing access, not the identity of the owner.

United States v. Wright, 838 F.3d 880 (7th Cir. 2016)

The opinion describes this case as recognizing a wife’s common authority over a household desktop computer despite her lack of the password. Its relevance is that password knowledge is not the exclusive measure of shared authority. The broader pattern of access and control remains important.

United States v. Thomas, 818 F.3d 1230 (11th Cir. 2016)

This decision recognized a then-wife’s common authority over a household computer. Alongside United States v. Wright, it supports applying established third-party-consent principles to electronic devices. Neither authority makes a personal relationship alone sufficient; the pertinent connection is shared access or control.

D. Preservation, seizure, and plain error

United States v. Critton, 43 F.3d 1089 (6th Cir. 1995), and United States v. Soto, 794 F.3d 635 (6th Cir. 2025), as cited in the opinion

These authorities address the consequences of failing to raise a suppression issue before the district court. The opinion invokes United States v. Soto to distinguish forfeiture from waiver: an unraised objection is not necessarily an intentional abandonment of a known right. Cook’s separate objection to seizure was therefore reviewed only for plain error.

United States v. Woods, 61 F.4th 471 (6th Cir. 2023)

This case provides the four-part plain-error framework: an error must have occurred, been obvious, affected substantial rights, and affected the fairness, integrity, or public reputation of judicial proceedings. Cook failed to establish an obvious constitutional error in the phone’s seizure.

United States v. Thibou, No. 24-1991, 2026 WL 126431 (6th Cir. Jan. 16, 2026); United States v. Sykes, 65 F.4th 867 (6th Cir. 2023); United States v. Avery, 137 F.3d 343 (6th Cir. 1997); and United States v. Jacobsen, 466 U.S. 109 (1984)

The court cites these decisions collectively to support temporarily securing property containing evidence of crime while officers obtain a search warrant. Once the consensual inspection revealed images of Cook possessing firearms, the officers knew that the phone contained evidence of conduct prohibited to him. That discovery supplied probable cause for its limited retention pending the warrant.

The opinion does not conduct a separate factual comparison with each authority. Their shared role is to support the distinction between preserving evidence through a seizure and conducting a further examination of its contents.

United States v. Thomas, 97 F.4th 1139 (8th Cir. 2024); United States v. Clutter, 674 F.3d 980 (8th Cir. 2012); and United States v. Johns, 469 U.S. 478 (1985)

These authorities support the court’s additional possessory-interest analysis. Cook remained in custody between the officers’ receipt of the phone and execution of the warrant, and the record contained no request for its return. On those facts, the court concluded that retention did not meaningfully interfere with his possessory interest. This reasoning is fact-specific; it does not establish that incarceration eliminates ownership interests or permits indefinite retention of property.

E. Ineffective assistance on direct appeal

United States v. Coleman, 835 F.3d 606 (6th Cir. 2016)

This decision states the general rule that ineffective-assistance claims should ordinarily await collateral proceedings. Direct review is appropriate only in the rare case that would not benefit from further factual development.

United States v. Fergson, 669 F.3d 756 (6th Cir. 2012), and United States v. Galloway, 316 F.3d 624 (6th Cir. 2003)

These cases support declining to decide ineffective-assistance claims on an insufficient appellate record. Cook’s allegations concerning uncontacted witnesses, inadequate notice of the suppression hearing, and deficient attorney communication required facts not established in the trial record. The court consequently made no merits determination about counsel’s effectiveness or prejudice.

F. Judicial impartiality and courtroom management

Burley v. Gagacki, 834 F.3d 606

This case supplies the objective recusal standard: whether a reasonable person knowing all the facts would reasonably question the judge’s impartiality. The inquiry extends beyond the judge’s own assessment of personal fairness.

United States v. Roach, 502 F.3d 425 (6th Cir. 2007)

Because Cook had not raised judicial bias below, this authority supported plain-error review of that claim. The preservation failure therefore affected the appellate framework for both seizure and recusal.

United States v. Justice, 14 F. App’x 426 (6th Cir. 2001)

This decision upheld denial of a request for replacement counsel made on the day of trial. It supported the conclusion that the judge’s refusal to replace Cook’s prepared attorney did not itself demonstrate partiality.

Liteky v. United States, 510 U.S. 540 (1994)

This Supreme Court decision explains that expressions of impatience, dissatisfaction, annoyance, or anger do not themselves establish judicial bias. It was central to the court’s contextual assessment of the judge’s sharp responses to Cook.

United States v. Morrow, 977 F.2d 222 (6th Cir. 1992) (en banc)

The court cited this decision because the challenged exchanges occurred outside the jury’s presence, reducing the risk that they influenced the verdict. That consideration supplemented, rather than replaced, the conclusion that the record did not establish bias or racial animus.

5. The Court’s Legal Reasoning

A. Consent supplied a route independent of parole-search authority

The district court relied on Cook’s supervision conditions and Ohio’s parole-search statute. The Sixth Circuit instead began with a different proposition: a valid consensual search does not require the justification that would otherwise be necessary for a nonconsensual search.

Once the court accepted E.C.’s authority and voluntary consent, it no longer needed to decide whether the officers possessed reasonable suspicion under Ohio Revised Code § 2967.131. The affirmance therefore should not be read as approving a particular interpretation of that statute or establishing that a general parole-search condition invariably authorizes examination of a phone’s digital contents.

B. Several facts together established the relevant shared access

The court relied on the combined significance of the following circumstances:

1. E.C. possessed the phone while Cook was in jail.
2. She independently used it to contact the parole officer.
3. Cook repeatedly called it to reach her, indicating his awareness that she was using it.
4. She answered a call in the officers’ presence.
5. She knew and supplied the passcode.
6. She described the phone as her only means of communication.
7. She willingly handed it over for inspection.

These facts showed substantially more than mere proximity to someone else’s device. They also provided an answer to the argument that the officers’ knowledge of Cook’s ownership invalidated their reliance on E.C.’s consent. Ownership and shared use can coexist.

C. The opinion’s terminology requires a careful reading

The court says that it need not decide whether E.C. had “actual authority” because she had “common authority.” Yet common authority ordinarily describes the shared-use basis for actual third-party authority, while apparent authority concerns an officer’s reasonable understanding of that authority.

The opinion’s operative analysis repeatedly asks what a reasonable officer could believe and whether E.C., “by all reasonable appearances,” had joint access or control. Its practical holding is therefore best understood through that fact-sensitive reasoning, rather than as establishing a new doctrinal category separate from actual and apparent authority.

Importantly, the court did not hold that possession of a passcode alone always authorizes consent, that dating someone creates authority over their phone, or that permission to make a call necessarily permits access to every digital compartment. The record presented no separately developed dispute about restricted applications, segregated files, or an express limitation on E.C.’s access.

D. Search and seizure required separate analysis

Examining a phone’s contents implicates privacy; retaining the device implicates possession. Cook’s challenge to the search did not automatically preserve a distinct challenge to the seizure.

After the consensual inspection disclosed evidence of prohibited firearm possession, the officers had probable cause to retain the phone temporarily while obtaining a warrant. The subsequent warrant supported the later examination; it was not treated as retroactively curing an unlawful initial search. The initial examination stood on consent.

E. The remaining claims required different treatment

Cook alleged that counsel failed to contact potential witnesses, failed to explain that he was attending a suppression hearing, and inadequately communicated with him. The court could not determine from the existing record what occurred or whether the alleged failures prejudiced the defense. Declining review left those factual questions unresolved rather than rejecting them as unfounded.

For judicial bias, the court examined the full context of the challenged exchanges. It acknowledged the judge’s exasperation but found that Cook had opportunities to explain his position. It also regarded the refusal to appoint new counsel on the morning of trial as legitimate case management rather than evidence of hostility.

The judge’s “Then move” response to Cook’s racially framed remarks, followed by reference to his criminal record, warranted contextual scrutiny. The appellate court nevertheless found neither racial animus nor disqualifying partiality. That conclusion does not make such language a model of judicial communication, nor does the jury’s absence categorically excuse biased conduct. It reflects the court’s assessment of this record under plain-error review.

6. Potential Impact and Limits

Digital searches will turn on evidence of actual use

The opinion gives investigators and litigants concrete indicators relevant to third-party consent: independent use, demonstrated access, password knowledge, and the owner’s conduct recognizing another person’s use. Future cases involving borrowed, shared, or informally shared devices will likely turn on the strength of comparable evidence.

The decision reinforces United States v. Gardner; it does not create a general rule allowing searches whenever a partner possesses a phone. Cases involving temporary possession, expressly limited access, unknown passwords, or clearly private digital areas may present materially different questions.

Parole-search disputes remain open where consent is absent

Because the court avoided the Ohio statutory issue, the opinion offers limited guidance on the reasonable suspicion necessary for a nonconsensual parolee phone search. Where no authorized person consents, the scope of supervision conditions and applicable statutory requirements will remain consequential.

Preservation must distinguish different Fourth Amendment interests

The seizure ruling highlights the importance of separately identifying objections to inspection, initial retention, and continued retention. A suppression motion focused only on searching digital contents may leave a later possessory challenge subject to demanding plain-error review.

Collateral review remains important for counsel-related claims

Allegations about investigation, confidential communications, and attorney-client interactions frequently depend on evidence outside the trial record. The decision preserves the ordinary preference for addressing such claims through a proceeding capable of developing those facts.

Judicial-bias analysis remains contextual

The opinion distinguishes adverse rulings and impatience from disqualifying partiality. Its holding does not immunize harsh comments from scrutiny; it requires assessment of the entire record, the substance of the remarks, and the applicable standard of review.

7. Complex Concepts Simplified

Common authority

Shared use and control sufficient to let one user authorize a search. Legal ownership is not the only consideration.

Actual authority and apparent authority

Actual authority exists when the person truly has the relevant access or control. Apparent authority concerns whether the circumstances reasonably lead officers to believe that such authority exists.

Voluntary consent

Permission freely given rather than obtained through coercion. Having authority and voluntarily exercising it are separate requirements.

Reasonable suspicion and probable cause

Reasonable suspicion is a particularized basis for suspecting unlawful activity. Probable cause is a stronger justification. Cook’s Ohio reasonable-suspicion argument was left undecided; probable cause became relevant to retaining the phone after incriminating material was discovered.

Search versus seizure

A search concerns examination of private information. A seizure concerns interference with possession or control of property. Each can require a distinct legal justification.

Forfeiture versus waiver

Forfeiture generally means failing to raise an argument in time. Waiver means intentionally relinquishing it. A forfeited claim may receive plain-error review.

De novo, clear error, and plain error

De novo review independently reassesses legal conclusions. Clear-error review is deferential to factual findings. Plain-error review imposes additional requirements when an objection was not preserved.

Direct appeal versus collateral review

A direct appeal ordinarily uses the existing trial record. Collateral review can provide an opportunity to develop additional facts, often essential for evaluating counsel’s performance.

8. Conclusion

United States v. Antoine Cook confirms that a phone owner’s exclusive title does not necessarily entail exclusive authority to consent to a search. Demonstrated shared use, access credentials, and the owner’s recognition of another user can reasonably support third-party consent.

The decision’s limits are equally significant. It does not resolve Ohio’s parole-search requirements, make passcode knowledge independently decisive, or authorize unlimited retention of an incarcerated person’s property. It also leaves Cook’s ineffective-assistance allegations undecided. Its broader contribution is a practical, record-specific application of established consent doctrine to digital devices, coupled with a reminder that preservation and evidentiary development can determine the scope of appellate review.