Group-Chat Participation Alone Does Not Create Fourth Amendment Rights in Another User’s Account

1. Introduction

In United States v. Nasir Lewis, the Sixth Circuit affirmed a conviction for aiding and abetting a kidnapping. The prosecution arose from a gang’s prolonged detention and assault of Taliyah Jackson, whom gang members suspected of helping arrange the shooting and carjacking of Cortez Blake. Nasir Lewis did not participate in the initial abduction, but video showed him standing over Jackson with a rifle and jabbing her with it while others attacked her.

The opinion’s principal contribution concerns digital privacy: participation in a private Instagram group chat does not, by itself, give a defendant a reasonable expectation of privacy in another participant’s account. Consequently, Lewis could not challenge searches of those accounts or suppress evidence from his own account merely because its discovery allegedly resulted from unconstitutional searches of other people’s accounts.

The court also addressed the proof necessary to establish intentional assistance in an ongoing kidnapping, the admissibility of a defendant’s later description of conduct as “kidnapping,” and whether an aiding-and-abetting instruction must expressly use the words “advance knowledge.” Although the decision applies established principles, it supplies important guidance on their operation in social-media investigations and prosecutions involving collective criminal conduct.

2. Background and Procedural History

The kidnapping and its digital record

In November 2021, rival gang members chased Blake and Jackson from a rental car in West Detroit. Blake, a member of the 1125 gang, was shot. Although Jackson was Blake’s childhood friend and accompanied him to the hospital, gang members came to suspect that she had helped arrange the attack.

Under the pretense of taking Jackson home, Blake’s associates instead brought her to a vacant lot for questioning. They later moved her to Blake’s house, where armed participants continued the interrogation. Jackson was held for more than seven hours and suffered physical injuries.

Cell-site evidence placed Lewis’s phone near Blake’s house during the detention. More decisively, a twenty-two-second recording showed Lewis armed with a rifle, standing over Jackson while two women assaulted her, and then jabbing her with the weapon.

A minor who accompanied one assailant recorded part of the assault. Someone subsequently posted a clip in an Instagram group chat used by gang members. Participants identified Lewis and discussed whether he was poking Jackson with his gun. Lewis asked who had recorded the incident, stated, “That is ki[d]napping,” criticized the participants, and threatened the girl who recorded it. Other messages concerned deleting the recording, and participants, including Lewis, left the chat.

The warrant sequence

The investigation initially concerned unlawful firearm possession. Its discovery of the kidnapping evidence led to additional warrants:

Investigators later obtained a separate warrant for the minor’s phone and recovered the assault video.

The prosecution and appeal

Lewis and six others were charged with conspiracy to kidnap and aiding and abetting kidnapping under 18 U.S.C. §§ 2 and 1201. Four defendants pleaded guilty. Lewis, Blake, and Karamoh Turner proceeded to trial.

Before trial, Lewis sought suppression of warrant-derived evidence, alternatively requested a hearing under Franks v. Delaware, 438 U.S. 154 (1978), and challenged certain statements and gang-related evidence. The district court denied suppression and the hearsay motion, while granting in part and denying in part the motion concerning Federal Rule of Evidence 404(b).

The jury acquitted Turner entirely. It acquitted Lewis and Blake of conspiracy but convicted both of aiding and abetting kidnapping. Lewis appealed his conviction, challenging the searches, evidentiary sufficiency, particular evidentiary rulings, and jury instructions.

3. Summary of the Opinion

The Sixth Circuit affirmed on every issue:

1. Third-party accounts: Lewis lacked a reasonable expectation of privacy in accounts that he neither owned, operated, nor controlled. His participation in a group chat did not supply the missing privacy interest.
2. His own account: His challenge depended on alleged violations of other account holders’ rights. Those alleged violations could not support suppression on his behalf.
3. Franks hearing: The claimed omission concerning the state warrants did not establish the materiality necessary for a hearing.
4. Sufficiency: The video, location evidence, and messages permitted a rational jury to find that Lewis intentionally facilitated an ongoing kidnapping.
5. Evidence: Any error in admitting the challenged photograph was harmless. Lewis’s “kidnapping” message was probative and not unfairly prejudicial, and no reversible limiting-instruction error occurred.
6. Instructions: Requiring intentional assistance in the kidnapping adequately conveyed advance knowledge without using that precise phrase.

4. Analysis: Precedents and Legal Reasoning

A. Standards of review shaped the available relief

The court’s conclusions depended partly on the distinction between reviewing legal questions independently and respecting jury findings or unpreserved trial rulings.

B. Fourth Amendment rights attach to the defendant’s protected interest, not simply to incriminating information

1. The personal-rights foundation

The court began with Rakas v. Illinois, 439 U.S. 128, 133–34 (1978), which establishes that Fourth Amendment rights are personal and cannot be asserted vicariously. Byrd v. United States, 584 U.S. 395, 403 (2018), likewise required an infringement of the defendant’s own rights.

United States v. Washington, 573 F.3d 279, 282–83 (6th Cir. 2009), connected that infringement to a reasonable expectation of privacy. United States v. King, 227 F.3d 732, 743 n.1 (6th Cir. 2000), clarified that “Fourth Amendment standing” is shorthand for this substantive privacy inquiry, rather than a separate procedural entitlement.

Under United States v. Rogers, 97 F.4th 1038, 1041–42 (6th Cir. 2024), Lewis needed both a subjective expectation of privacy and an expectation society recognizes as reasonable. Relevant considerations included proprietary or possessory interests, authority to exclude others, and legitimate access to the place searched.

Association with the account holder or involvement in the same crime was insufficient. United States v. Padilla, 508 U.S. 77, 81–82 (1993), rejects special standing for co-conspirators and codefendants. United States v. Leon, 468 U.S. 897, 910 (1984), was cited for the corresponding limitation on exclusion: the defendant seeking the remedy must be the victim of the unlawful search. The opinion did not resolve the case through that decision’s separate good-faith doctrine.

2. Account control mattered; chat membership did not suffice

Lewis possessed no identified ownership, management, editorial, or privacy-setting authority over Blake’s account. Drawing on United States v. Mastromatteo, 538 F.3d 535, 544 (6th Cir. 2008), the court compared his position to someone lacking a property or possessory interest in another person’s dresser or diary.

The analogy was not an absolute rule that only an account’s formal owner can have protected privacy interests. Minnesota v. Olson, 495 U.S. 91, 100 (1990), recognizes an overnight guest’s privacy interest in another person’s home. Using that principle, the court suggested that someone managing another person’s social-media account might have a limited protected interest. That possibility remained hypothetical because Lewis had no comparable role.

United States v. Zelaya-Veliz, 94 F.4th 321, 333–34 (4th Cir. 2024), supported the proposition that nonpublic social-media content, including private messages, can receive Fourth Amendment protection. But protection for private content does not answer whose rights a particular search infringes. The defect in Lewis’s claim was his relationship to the searched accounts, not a categorical absence of privacy in social media.

3. The court distinguished a recipient’s account from a shared private space

Lewis argued that the group chat was an online space shared with a defined group, rather than merely someone else’s data. He relied on two precedents that the court found distinguishable.

First, United States v. Warshak, 631 F.3d 266, 288 (6th Cir. 2010), recognized privacy in the defendant’s own email account. Here, investigators obtained the relevant conversation from Ramone’s Instagram account. The court instead applied the delivered-letter analogy from United States v. King, 55 F.3d 1193, 1196 (6th Cir. 1995): a sender’s expectation of privacy ordinarily ends upon delivery. Sending a communication did not give Lewis a continuing right to challenge its seizure from the recipient’s account.

Second, United States v. King, 227 F.3d 732, 749–50 (6th Cir. 2000), involved a shared basement in a two-family dwelling. The defendant had legitimate access and rights to exclude outsiders. Lewis had no equivalent interest in Ramone’s account. In the court’s analogy, the account was the searched location, and the chat was evidence found there—not a separate shared location carrying its own independent privacy interest.

This characterization is central to the opinion. The government searched specified accounts for evidence; it did not obtain a warrant framed as a search of a freestanding communal chat space. Membership in the conversation therefore did not establish authority over the place actually searched.

4. Alleged violations of others’ rights could not invalidate the search of Lewis’s account

Lewis’s own account presented a different starting point. The court acknowledged that he likely had some reasonable expectation of privacy there, but expressly declined to define its extent.

His argument nevertheless failed because it depended on the alleged illegality of earlier searches of other people’s accounts. United States v. Williams, 354 F.3d 497, 510–11 (6th Cir. 2003), rejects suppression simply because evidence resulted from a violation of a codefendant’s Fourth Amendment rights. A later search of Lewis’s account did not allow him to assert retrospectively the rights of Blake or other account holders.

United States v. Noble, 762 F.3d 509, 526, 529 (6th Cir. 2014), provided a procedural qualification: a government standing argument can be waived. The opinion cited that case while explaining that defendants ordinarily cannot challenge searches of their codefendants. No comparable waiver prevented reliance on Lewis’s lack of a protected interest here.

The resulting holding is limited: Lewis could not use alleged third-party violations as the basis for exclusion. The court did not decide that all the warrants were substantively valid, nor did it reject a separately established violation of Lewis’s own account rights.

5. The Franks request failed for the same underlying reason

Under Franks v. Delaware, Lewis sought a hearing concerning the affidavit supporting the warrant for his account. His theory was that the affidavit omitted the supposedly critical fact that its information originated in defective state warrants.

United States v. Mastromatteo establishes that a protected Fourth Amendment interest is a prerequisite to a Franks hearing. For the omission theory concerning Lewis’s own warrant, United States v. Hanna, 661 F.3d 271, 285 (6th Cir. 2011), required a strong preliminary showing that information critical to probable cause was omitted with an intention to mislead. United States v. Bateman, 945 F.3d 997, 1008 (6th Cir. 2019), reinforced the requirement that the omission be necessary to the probable-cause finding.

Because Lewis could not invoke the alleged defects in the state warrants, disclosure of those asserted defects would not materially undermine probable cause on his theory. The court’s treatment of those warrants as sufficient “for our purposes” was not a merits determination approving them. It explained why the proposed omission did not establish materiality in Lewis’s case.

C. Intentional assistance during an ongoing kidnapping was sufficient

1. Participation need not cover every stage of the offense

The principal statutory provisions were 18 U.S.C. § 1201, governing kidnapping, and § 2, making an aider and abettor punishable as a principal. The government needed to establish a qualifying unlawful seizure or restraint, a holding for ransom, reward, or otherwise, and the federal jurisdictional connection.

The companion precedent, United States v. Blake, 166 F.4th 611, 623–24 (6th Cir. 2026), supplied the governing kidnapping and aiding-and-abetting formulations. Lewis had to take an affirmative act furthering the kidnapping with the intent to facilitate it. Assistance during only one phase or element could suffice.

Rosemond v. United States, 572 U.S. 65, 76–77 (2014), supplied the mental-state principle: active participation with knowledge of a criminal scheme’s extent and character can establish intent to bring about its commission. Mere presence or awareness would not be enough.

United States v. Horton, 847 F.2d 313, 322 (6th Cir. 1988), established that someone must commit every essential element of the underlying crime, but the aider and abettor need not personally commit all those elements. Thus, Lewis’s absence from the initial abduction did not prevent conviction for intentionally assisting the continuing detention.

2. The rifle evidence connected Lewis to coercion, not merely presence

The video showed conduct capable of helping maintain control over Jackson and extracting information from her. Armed intimidation while others physically attacked her supported an inference that Lewis intended to further the detention and interrogation.

United States v. Frazier, 129 F.4th 392, 404 (7th Cir. 2025), offered a close analogy: joining an ongoing detention and holding a gun to the victim’s head while demanding the return of property supported aiding-and-abetting liability. Its relevance lay in purposeful armed participation after the offense was already underway.

The court also relied on Davis v. Lafler, 658 F.3d 525, 533 (6th Cir. 2011) (en banc), to assess the evidence collectively rather than isolate the video. Location data corroborated presence, while the group chat supported knowledge of the revenge plot and kidnapping. Together, the evidence permitted an inference of intentional assistance, not merely an unrelated assault.

3. The detention’s duration was measured by the underlying kidnapping

Chatwin v. United States, 326 U.S. 455, 460 (1946), defines holding through unlawful physical or mental restraint for an appreciable period against the victim’s will, accompanied by a willful intent to confine. Lewis focused on the video’s twenty-two-second duration and requested adoption of a four-factor test used elsewhere.

The court declined that invitation. Jackson’s detention lasted more than seven hours, and Lewis could be liable for intentionally assisting the kidnapping committed by his confederates. The government did not have to prove that the recorded segment, standing alone, constituted an independently sufficient kidnapping.

United States v. Ingram, 846 F. App’x 374, 384 (6th Cir. 2021), supported the conclusion that an extended restraint—there, approximately an hour of continued transportation—could constitute holding against the victim’s will. Jackson’s testimony and messages permitted that conclusion here.

The court additionally observed that Lewis’s own armed conduct could constitute confinement. United States v. Small, 988 F.3d 241, 253–55 (6th Cir. 2021), supported an ordinary understanding of confinement as keeping someone within a location or limits. McLaughlin v. United States, 476 U.S. 16, 17–18 (1986), explained the intimidating and dangerous effects of displaying a gun. Together, these authorities supported the inference that Lewis’s rifle helped restrain Jackson.

The opinion therefore neither adopts a new duration test nor holds that twenty-two seconds necessarily satisfies the holding requirement in another case.

4. Federal jurisdiction and attempted incorporation of another appeal

Lewis attempted to adopt a Commerce Clause argument from Blake’s separate appeal. Federal Rule of Appellate Procedure 28(i) did not permit that method because these appeals were not consolidated and Lewis was the only appellant in his case.

United States v. Gibbs, 182 F.3d 408, 421 (6th Cir. 1999), illustrated adoption of arguments among defendant-appellants in an appropriate appellate setting; it did not authorize incorporation from an unrelated appeal.

Independently, United States v. Blake, 166 F.4th at 625, already held that cellphone use in furtherance of kidnapping satisfies the jurisdictional requirement because a cellphone is an instrumentality of interstate commerce. The panel followed that binding circuit rule rather than conducting a new constitutional analysis.

D. The evidentiary rulings distinguished harmful evidence from unfair prejudice

1. The photograph: affirmance through harmlessness

The challenged photograph depicted Lewis beside Turner while armed with a rifle and also raised concerns about drugs. The court did not decide whether admitting it was error. Under United States v. Singh, any error was harmless because stronger independent evidence established Lewis’s connection to the group and intentional participation.

The video independently showed firearm possession. The chat supplied evidence of his association and knowledge, and location data placed his phone near the house for at least four hours. Defense counsel’s opening statement also acknowledged marijuana use. Against this record, the photograph was not a decisive evidentiary link.

The omitted limiting instruction likewise did not establish a reasonable probability of a different outcome under United States v. Bauer. This holding should not be mistaken for blanket approval of gang photographs or a comprehensive ruling on their admissibility under Rule 404(b).

2. Lewis’s own description of the event was relevant to knowledge and intent

Lewis separately challenged his statement, “That is ki[d]napping,” as lacking probative value and creating unfair prejudice. Under Rules 401 and 403, however, the statement could corroborate Jackson’s account and support an inference that Lewis understood the character of the conduct he had assisted.

United States v. Baskerville, 164 F.4th 459, 491–92 (6th Cir. 2026), emphasized that Rule 403 favors admission and that powerful evidence of guilt is not necessarily unfairly prejudicial. The relevant question is whether probative value is substantially outweighed by a danger such as conviction on an improper basis. United States v. Page, 163 F.4th 385, 397 (6th Cir. 2025), further supported the distinction between evidence that damages a defense and evidence that unfairly prejudices it.

Context strengthened the inference. Other participants had identified Lewis in the recording and discussed his gun use. His apparent anger concerned the recording’s existence. The court treated that exchange as evidence bearing on his awareness and purpose, not simply as an isolated lay label for the offense.

3. Later statements can illuminate an earlier state of mind

Lewis argued that a post-event characterization could not establish intent at the time of the kidnapping. The court rejected that categorical position.

United States v. Jaffal, 79 F.4th 582, 593–98 (6th Cir. 2023), approved the use of jail calls as evidence of intent to distribute narcotics. United States v. Barnes, 822 F.3d 914, 920–24 (6th Cir. 2016), similarly involved jail-call evidence, although a limiting instruction was given there. United States v. Ausmus, 774 F.2d 722, 728 (6th Cir. 1985), recognized the relevance of tax-payment conduct both before and after the charged years.

These authorities demonstrate that later words or conduct may support an inference about an earlier mental state. They do not make later statements conclusive proof. Their significance depends on context and their connection to the charged conduct.

4. His own message had an independent nonhearsay basis

The district court conditionally admitted the group chat under Rule 801(d)(2)(E), concerning statements made during and in furtherance of a conspiracy. On appeal, Lewis did not challenge the chat as a whole on that ground.

The opinion also identified an independent basis for admitting his own statement. As explained in United States v. Blake, a defendant’s messages offered against that defendant are admissible as opposing-party statements under Rule 801(d)(2)(A). That route did not depend on establishing that Lewis’s particular message qualified as a coconspirator statement.

United States v. Martinez, 430 F.3d 317, 330 (6th Cir. 2005), explains that properly admitted statements of this kind are competent evidence for all purposes, so no limiting instruction is required on that basis. Combined with the absence of a Rule 403 error, this defeated Lewis’s instruction argument concerning the message.

E. Advance knowledge need not be expressed through formulaic wording

The district court instructed that the jury had to find that a kidnapping occurred, that Lewis helped or encouraged its commission, and that he intended to provide that help or encouragement. It also warned that knowledge alone was insufficient: Lewis had to do something to assist with the intent that the crime be committed.

United States v. Frei, 995 F.3d 561, 565 (6th Cir. 2021), required evaluating instructions as a whole for confusion, misleading content, and prejudice. Following a pattern instruction was relevant but not automatically conclusive.

The controlling comparison was United States v. Chavez, 951 F.3d 349, 362 (6th Cir. 2020). There, substantially similar language covered advance knowledge because a person cannot intentionally help commit a crime without already knowing about it. The district court therefore did not have to recite the precise words “advance knowledge.”

United States v. Henry, 797 F.3d 371 (6th Cir. 2015), did not require a different result. Its problematic instruction concerned a compound offense and could permit conviction based on an intent to assist only the underlying bank robbery rather than the armed robbery. Here, the instruction specifically required intent to assist kidnapping; it did not blur a distinction between a lesser underlying crime and an additional aggravating component.

The court consequently found it unnecessary to resolve the parties’ disagreement about the applicable standard of review. The instruction was adequate under the governing substantive principles.

5. Potential Impact and Limits

Account-specific analysis in digital investigations

The decision encourages courts to identify precisely which account was searched and what relationship the defendant had to it. A desire for confidentiality, participation in a closed conversation, and ownership of one’s own account do not automatically create rights over another participant’s stored copy.

Its practical consequence is significant: evidence discovered in a recipient’s account may be usable against a sender even when the sender alleges that the recipient’s account was searched unlawfully. The constitutional inquiry remains personal rather than conversation-wide.

Not a general authorization to search private communications

The opinion does not hold that private messages lack constitutional protection, authorize warrantless account searches, or determine the full scope of privacy in a user’s own account. It also leaves room for different facts involving account management or control. Questions about warrant breadth, particularity, or other independent defects remain available to a defendant whose own protected interests are implicated.

Participation after an abduction can carry principal liability

For kidnapping prosecutions, the decision reinforces that an offender may join an ongoing crime after the initial seizure. Armed intimidation during detention can constitute meaningful assistance. Nevertheless, the government must still prove intentional facilitation; gang association, presence, or knowledge alone does not satisfy § 2.

Later digital statements remain important but contextual evidence

Messages discussing a completed offense may help prove earlier knowledge or intent and may be admissible against their author without satisfying the coconspirator provision. Courts must still consider relevance and unfair prejudice. The decision does not convert every boast, accusation, or legal characterization into conclusive proof.

Preservation and precise appellate briefing matter

The different treatment of the photograph and message illustrates the consequences of preserving objections. Counsel must also raise arguments in the proper appeal rather than assume that briefing in a related prosecution is incorporated automatically. At the same time, the opinion shows that an evidentiary issue may be resolved through harmlessness without establishing a broad admissibility precedent.

6. Complex Concepts Simplified

Fourth Amendment standing

The question whether the challenged search infringed this defendant’s own protected privacy interest. Being incriminated by the evidence is not enough.

Exclusion and derivative evidence

Evidence obtained through an unconstitutional search, and sometimes evidence derived from it, may be suppressed. But a defendant ordinarily cannot obtain suppression solely because someone else’s rights were violated.

Franks hearing

A hearing to examine a sufficiently supported claim that a warrant affidavit contains materially misleading information. A defendant must make the required preliminary showing; alleging an omission alone does not secure a hearing.

Aiding and abetting

Intentionally helping or encouraging another person’s crime. The helper can be punished as a principal without personally performing every part of the offense.

Holding for an appreciable period

Keeping someone under unlawful physical or psychological restraint for a meaningful period against that person’s will. Here, the relevant detention lasted over seven hours, not merely the recorded twenty-two seconds.

Opposing-party statement

A party’s own statement offered against that party. Under Rule 801(d)(2)(A), it is classified as nonhearsay.

Unfair prejudice

A risk that evidence will prompt a decision for an improper reason. Evidence is not unfair merely because it strongly supports guilt.

Harmless error and plain error

Harmless-error review asks whether an established error materially affected the verdict. Plain-error review applies to unpreserved claims and imposes additional requirements before an appellate court will grant relief.

Advance knowledge

Knowledge of the crime sufficient to make assistance intentional. An instruction can convey that requirement through its substance without using those exact words.

7. Conclusion

United States v. Nasir Lewis applies the personal nature of Fourth Amendment rights to private group messaging: chat participation alone does not confer a protected interest in another user’s account, and alleged violations of that user’s rights cannot supply Lewis’s suppression remedy.

The decision also confirms that intentional armed assistance during an ongoing kidnapping can support conviction, later messages can illuminate earlier intent, and properly framed intentional-assistance instructions need not recite “advance knowledge.” Its significance lies in these concrete applications—not in a general withdrawal of constitutional protection from private digital communications.