United States v. Michael Nowak

Plain English (For Everyone)

Imagine your cell phone provider keeps a log of which cell towers your phone connects to, like a digital breadcrumb trail. The court said that because you give this information to your provider when you use your phone, you don't have a strong privacy claim to it. So, the police can get this location data without a warrant, like looking at a public record.

For Legal Practitioners

The Seventh Circuit affirmed the denial of a motion to suppress CSLI, holding that a subscriber lacks a reasonable expectation of privacy in data voluntarily disclosed to a third-party provider. This ruling aligns with existing precedent on third-party doctrine and may impact future arguments regarding digital privacy, particularly concerning historical CSLI. Practitioners should advise clients that warrantless access to such data is likely permissible.

For Law Students

This case tests the application of the third-party doctrine to cell site location information (CSLI). The court found that CSLI is akin to other information voluntarily disclosed to service providers, thus falling outside Fourth Amendment protection against warrantless searches. This reinforces the principle that individuals assume the risk of disclosure when sharing information with third parties, a key concept in Fourth Amendment jurisprudence.

Newsroom Summary

The Seventh Circuit ruled that police can access your cell phone's location history without a warrant. The court decided that by using your phone, you give up privacy rights to that location data held by your provider. This decision affects anyone with a cell phone, potentially increasing government surveillance capabilities.

Constitutional Issues

Fourth Amendment (unreasonable searches and seizures)Due Process

Rule Statements

"A judge's determination of probable cause is a practical, common-sense decision whether, given all the circumstances set forth in the affidavit before him, including the 'veracity' and 'basis of knowledge' of persons supplying hearsay information, there is a fair probability that contraband or evidence of a crime will be found in a particular place."

"The necessity requirement is not intended to preclude the use of wiretaps whenever less intrusive investigative methods might conceivably be employed. Rather, it requires that the government explain why such methods are insufficient or too dangerous."

Remedies

Suppression of evidence obtained from the second wiretap.Affirmation of the denial of the motion to suppress evidence from the first wiretap.

Judges

• Diane S. Sykes

Attorneys

• Michael Nowak
• Michael R. Dreeben

Scenario: You're a suspect in a crime, and police want to know where your phone was around the time it occurred. They ask your cell phone provider for your location data from the past week without getting a warrant.

Your Rights: Based on this ruling, you generally do not have a Fourth Amendment right to privacy in the cell site location information (CSLI) that your phone provider collects and retains. Therefore, police may be able to obtain this data without a warrant.

What To Do: While you may not be able to prevent the police from obtaining this data, you have the right to legal representation. If you are contacted by law enforcement or believe you are under investigation, consult with an attorney immediately to understand your rights and options.

Is it legal for police to get my cell phone's location history from my provider without a warrant?

Depends. In the Seventh Circuit, this ruling suggests it is legal to obtain cell site location information (CSLI) without a warrant because the court found no reasonable expectation of privacy in data voluntarily shared with a provider. However, other circuits may have different rulings, and the Supreme Court has not definitively settled this issue nationwide.

This ruling applies specifically to the Seventh Circuit, which covers Illinois, Indiana, and Wisconsin. Other federal circuits may have different interpretations of the Fourth Amendment regarding CSLI.

For Cell phone users

Cell phone users in the Seventh Circuit should be aware that their historical location data, as recorded by their service provider, may be accessed by law enforcement without a warrant. This could lead to increased scrutiny of individuals' movements and associations.

For Law enforcement agencies

Law enforcement agencies in the Seventh Circuit now have a clearer path to obtaining historical cell site location information (CSLI) without needing to secure a warrant. This ruling may streamline investigations by providing access to valuable location data.

Q: What is United States v. Michael Nowak about?

United States v. Michael Nowak is a case decided by Seventh Circuit on August 20, 2025.

Q: What court decided United States v. Michael Nowak?

United States v. Michael Nowak was decided by the Seventh Circuit, which is part of the federal judiciary. This is a federal appellate court.

Q: When was United States v. Michael Nowak decided?

United States v. Michael Nowak was decided on August 20, 2025.

Q: Who were the judges in United States v. Michael Nowak?

The judge in United States v. Michael Nowak: Kirsch.

Q: What is the citation for United States v. Michael Nowak?

The citation for United States v. Michael Nowak is . Use this citation to reference the case in legal documents and research.

Q: What is the full case name and citation for this Seventh Circuit decision?

The case is United States v. Michael Nowak, decided by the United States Court of Appeals for the Seventh Circuit. The specific citation is not provided in the summary, but it is a Seventh Circuit opinion concerning a Fourth Amendment challenge to cell phone data.

Q: Who were the parties involved in the United States v. Michael Nowak case?

The parties were the United States, as the appellant seeking to uphold the district court's decision, and Michael Nowak, the appellee who had his motion to suppress evidence denied by the district court.

Q: What was the core legal issue decided in United States v. Michael Nowak?

The central issue was whether Michael Nowak had a reasonable expectation of privacy in his cell site location information (CSLI) data retained by his cell phone provider, and if a warrantless search of this data violated his Fourth Amendment rights.

Q: When was the Seventh Circuit's decision in United States v. Michael Nowak issued?

The provided summary does not specify the exact date of the Seventh Circuit's decision, only that it was issued by that court.

Q: Where did the initial legal proceedings in United States v. Michael Nowak take place?

The initial legal proceedings, including the motion to suppress evidence, took place in a federal district court, which the Seventh Circuit later affirmed.

Q: Is United States v. Michael Nowak published?

United States v. Michael Nowak is a published, precedential opinion. Published opinions carry precedential weight and can be cited as authority in future cases.

Q: What topics does United States v. Michael Nowak cover?

United States v. Michael Nowak covers the following legal topics: Fourth Amendment search and seizure, Voluntary consent to search, Totality of the circumstances test for consent, Attenuation doctrine, Suppression of evidence.

Q: What was the ruling in United States v. Michael Nowak?

The court ruled in favor of the defendant in United States v. Michael Nowak. Key holdings: The court held that an individual does not possess a reasonable expectation of privacy in cell site location information (CSLI) data that a third-party cell phone provider retains, as this information is voluntarily disclosed to the provider.; Because Nowak voluntarily conveyed CSLI to his cell phone provider, he assumed the risk that the provider would share that information with the government, and thus retained no legitimate expectation of privacy in it.; The court rejected Nowak's argument that the Supreme Court's decision in Carpenter v. United States, which requires a warrant for CSLI, should apply retroactively to his case.; The court found that Nowak's reliance on Carpenter was not objectively reasonable, and therefore, he could not benefit from the good-faith exception to the exclusionary rule.; The district court's denial of Nowak's motion to suppress was affirmed because the search of his CSLI data did not violate the Fourth Amendment under the prevailing legal standards at the time of the search..

Q: Why is United States v. Michael Nowak important?

United States v. Michael Nowak has an impact score of 60/100, indicating significant legal impact. This decision reinforces the third-party doctrine's application to data held by service providers, even in the context of evolving privacy rights concerning digital information like cell site location data. It clarifies that the Supreme Court's ruling in Carpenter v. United States, requiring warrants for CSLI, does not automatically render prior warrantless searches of such data illegal, particularly when the good-faith exception applies.

Q: What precedent does United States v. Michael Nowak set?

United States v. Michael Nowak established the following key holdings: (1) The court held that an individual does not possess a reasonable expectation of privacy in cell site location information (CSLI) data that a third-party cell phone provider retains, as this information is voluntarily disclosed to the provider. (2) Because Nowak voluntarily conveyed CSLI to his cell phone provider, he assumed the risk that the provider would share that information with the government, and thus retained no legitimate expectation of privacy in it. (3) The court rejected Nowak's argument that the Supreme Court's decision in Carpenter v. United States, which requires a warrant for CSLI, should apply retroactively to his case. (4) The court found that Nowak's reliance on Carpenter was not objectively reasonable, and therefore, he could not benefit from the good-faith exception to the exclusionary rule. (5) The district court's denial of Nowak's motion to suppress was affirmed because the search of his CSLI data did not violate the Fourth Amendment under the prevailing legal standards at the time of the search.

Q: What are the key holdings in United States v. Michael Nowak?

1. The court held that an individual does not possess a reasonable expectation of privacy in cell site location information (CSLI) data that a third-party cell phone provider retains, as this information is voluntarily disclosed to the provider. 2. Because Nowak voluntarily conveyed CSLI to his cell phone provider, he assumed the risk that the provider would share that information with the government, and thus retained no legitimate expectation of privacy in it. 3. The court rejected Nowak's argument that the Supreme Court's decision in Carpenter v. United States, which requires a warrant for CSLI, should apply retroactively to his case. 4. The court found that Nowak's reliance on Carpenter was not objectively reasonable, and therefore, he could not benefit from the good-faith exception to the exclusionary rule. 5. The district court's denial of Nowak's motion to suppress was affirmed because the search of his CSLI data did not violate the Fourth Amendment under the prevailing legal standards at the time of the search.

Q: What cases are related to United States v. Michael Nowak?

Precedent cases cited or related to United States v. Michael Nowak: Carpenter v. United States, 138 S. Ct. 2206 (2018); Smith v. Maryland, 442 U.S. 735 (1979); United States v. Jones, 565 U.S. 405 (2012).

Q: What did the Seventh Circuit hold regarding Michael Nowak's expectation of privacy in his CSLI data?

The Seventh Circuit held that Michael Nowak did not possess a reasonable expectation of privacy in the cell site location information (CSLI) data that his cell phone provider retained. This was because he voluntarily provided this information to the provider.

Q: Did the warrantless search of Michael Nowak's CSLI data violate the Fourth Amendment, according to the Seventh Circuit?

No, the Seventh Circuit affirmed the district court's denial of the motion to suppress, holding that the warrantless search of Nowak's CSLI data did not violate the Fourth Amendment because he lacked a reasonable expectation of privacy in that information.

Q: What legal principle did the Seventh Circuit apply to determine Nowak's expectation of privacy?

The court applied the principle established in cases like Smith v. Maryland, which holds that individuals generally do not have a reasonable expectation of privacy in information voluntarily conveyed to third parties, such as a cell phone provider.

Q: What is 'cell site location information' (CSLI)?

Cell site location information (CSLI) refers to data generated by a cell phone that indicates which cell towers the phone is communicating with, thereby revealing the phone's approximate geographical location over time.

Q: What was the nature of the dispute regarding the cell phone data in this case?

The dispute centered on whether the government needed a warrant to obtain Michael Nowak's CSLI data from his cell phone provider. Nowak argued that a warrantless search was unconstitutional, while the government contended he had no privacy interest in the data.

Q: What was the outcome of Michael Nowak's motion to suppress evidence?

Michael Nowak's motion to suppress evidence obtained from his cell phone was denied by the district court, and this denial was subsequently affirmed by the Seventh Circuit Court of Appeals.

Q: What is the significance of voluntarily providing information to a third party in Fourth Amendment law?

Under Fourth Amendment jurisprudence, voluntarily providing information to a third party, such as a service provider, generally means the individual relinquishes any reasonable expectation of privacy in that information, making it accessible to law enforcement without a warrant.

Q: Did the Seventh Circuit consider the actual content of Nowak's communications?

The summary focuses solely on cell site location information (CSLI). It does not indicate that the Seventh Circuit considered the content of Nowak's communications, which would likely involve different Fourth Amendment standards.

Q: What is the relationship between this ruling and the Supreme Court's decision in Carpenter v. United States?

The Seventh Circuit's reasoning in Nowak appears to distinguish itself from the Supreme Court's holding in Carpenter v. United States, which held that a warrant is generally required to access historical CSLI. This suggests the Seventh Circuit may be interpreting Carpenter narrowly or applying a different aspect of third-party doctrine.

Q: How does United States v. Michael Nowak affect me?

This decision reinforces the third-party doctrine's application to data held by service providers, even in the context of evolving privacy rights concerning digital information like cell site location data. It clarifies that the Supreme Court's ruling in Carpenter v. United States, requiring warrants for CSLI, does not automatically render prior warrantless searches of such data illegal, particularly when the good-faith exception applies. As a decision from a federal appellate court, its reach is national. This case is moderate in legal complexity to understand.

Q: Does this ruling mean the government can always access cell phone location data without a warrant?

This ruling specifically addresses CSLI data retained by a cell phone provider. It does not necessarily apply to real-time location tracking or data not voluntarily shared with a third party, which may still require a warrant.

Q: Who is most affected by the ruling in United States v. Michael Nowak?

Cell phone users are directly affected, as the ruling clarifies that the location data held by their service providers may not be considered private under the Fourth Amendment, potentially impacting how law enforcement can access such information.

Q: What are the practical implications for individuals regarding their cell phone location data?

Individuals should be aware that the location data generated by their cell phones and stored by their providers is likely not protected by a reasonable expectation of privacy, meaning it could be obtained by law enforcement without a warrant in certain circumstances.

Q: How might this ruling affect law enforcement investigations?

This ruling could streamline investigations by allowing law enforcement to more easily obtain historical CSLI data from cell phone providers without needing to secure a warrant, provided the legal framework surrounding third-party doctrine remains consistent.

Q: Are there any compliance implications for cell phone providers?

While this case focuses on the user's expectation of privacy, cell phone providers must still comply with existing legal processes for data disclosure, which may involve subpoenas or court orders depending on the specific type of data and jurisdiction.

Q: How does this decision fit within the broader legal history of digital privacy?

This decision aligns with the long-standing 'third-party doctrine' in Fourth Amendment law, which has historically limited privacy protections for information shared with service providers. It continues the trend of applying older legal principles to new technologies.

Q: What legal precedent does United States v. Michael Nowak build upon?

The decision builds upon precedents like Smith v. Maryland (1979), which established that individuals have no reasonable expectation of privacy in numbers dialed on a landline telephone, and United States v. Miller (1976), concerning bank records.

Q: How does this ruling compare to other landmark digital privacy cases?

Unlike cases that have expanded privacy rights in digital data, such as Carpenter v. United States (which required a warrant for historical CSLI), this ruling reinforces a more traditional view of third-party data, though Carpenter's specific holding on CSLI may create distinctions.

Q: What was the docket number in United States v. Michael Nowak?

The docket number for United States v. Michael Nowak is 23-2846. This identifier is used to track the case through the court system.

Q: Can United States v. Michael Nowak be appealed?

Potentially — decisions from federal appellate courts can be appealed to the Supreme Court of the United States via a petition for certiorari, though the Court accepts very few cases.

Q: How did Michael Nowak's case reach the Seventh Circuit Court of Appeals?

The case reached the Seventh Circuit on appeal after the federal district court denied Michael Nowak's motion to suppress evidence. The government appealed the denial of the motion to suppress, and the Seventh Circuit reviewed that decision.

Q: What was the procedural posture of the case when it was before the Seventh Circuit?

The procedural posture was an appeal by the government following the district court's denial of Nowak's motion to suppress. The Seventh Circuit reviewed the district court's legal conclusions regarding the Fourth Amendment.

Q: What specific type of evidence was at issue in the motion to suppress?

The specific evidence at issue was the cell site location information (CSLI) data retained by Michael Nowak's cell phone provider, which was obtained by the government without a warrant.