Technology is changing how police officers build criminal cases. Interviews and physical evidence still matter, but investigators may also examine phones, online activity, vehicle sightings, and financial records.
In June 2026, the Supreme Court ruled in Chatrie v. United States that police who are searching a person’s location history through Google must follow Fourth Amendment protections against unreasonable searches. However, the Court did not decide whether the warrant police used in that case met those requirements. It sent the case back to a lower court to make that decision.
Digital records rarely tell the whole story in a criminal case. A criminal defense attorney can examine how evidence was obtained, whether police followed the law, and what the data proves.
How Does Location Data Help Police Investigate Crimes?
Police use cell phone records, GPS data, and license plate readers to track people’s movements during criminal investigations. Cell phone records show which towers a phone connected to, while GPS data can provide a more precise location. However, neither will prove who was carrying a phone.
Police have also used geofence warrants to identify devices near crime scenes. In July 2025, Google changed how it stores location data, limiting its ability to respond to these requests. In Carpenter v. United States (2018), the Supreme Court ruled that police ordinarily need a warrant to obtain historical cell phone location records.
Location data can help investigators build timelines in violent crime cases. However, the records are not always accurate, and being near a crime scene does not prove that someone committed a crime.
What Can Police Recover From a Phone?
Police can use forensic tools to recover messages, call records, photos, internet browsing history, and app data from a phone. Some deleted information can also be recovered, depending on the device and how the data was removed.
Investigators can also request information stored in cloud accounts and backups. However, different legal rules may apply depending on the type of information requested.
In Riley v. California (2014), the Supreme Court ruled that police ordinarily need a warrant to search a phone seized during an arrest. Exceptions include consent and certain emergencies. Even with a warrant, police must stay within the permitted scope of the search.
Digital evidence is especially important in sex offense investigations, where messages and images can be central to a case. However, investigators must consider when the information was created, whether it is authentic, and who was responsible for it.
How Is Surveillance Affecting Drug Investigations?
Police may use technology alongside witnesses and controlled purchases to investigate drug crimes. License plate readers can track vehicle movements, cameras monitor may certain locations, and financial records can help investigators identify possible drug transactions.
Investigators may also use tools that record who contacted whom without revealing the content of conversations. When messages are encrypted, police may try to recover them from seized devices, or they may request records from service providers.
In drug crime investigations, this evidence can help police identify suspects and possible connections between people. However, financial transactions, vehicle movements, and communications do not automatically prove that criminal activity occurred. A defense attorney can challenge the accuracy of the evidence and whether police obtained it legally.
Why Does Digital Evidence Matter in Financial Cases?
Police may use emails, accounting records, and electronic payments to investigate financial crimes. Software can help identify unusual transactions and patterns that could suggest fraud. However, suspicious activity does not automatically mean someone committed a crime.
Banks may also monitor transactions and report certain suspicious activities to authorities. These reports can lead to further investigation, but financial records must be examined in context.
In white-collar crime investigations, a defense attorney can examine whether transactions had legitimate business purposes and whether important records are missing. The defense can also challenge how evidence was collected and request information that could help establish the accused person’s innocence.
How Reliable Is Digital Evidence in Criminal Cases in 2026?
Digital evidence can be useful in criminal investigations, but it is not always accurate. Several factors can affect how reliable it is:
- Facial recognition: Software can identify possible matches, but it cannot confirm someone’s identity without additional evidence.
- Location data: GPS and cell phone records can contain errors, and they may not show someone’s exact location.
- Timestamps: Different time zones, device settings, and automatic backups can affect when records appear to have been created.
- Shared devices: Phones, computers, and online accounts can have multiple users, making it difficult to prove who was responsible for certain activity.
Investigators must also examine how digital evidence was collected, stored, and analyzed. A defense attorney can challenge unreliable evidence and question whether it actually connects the accused person to a crime.
How Can You Protect Your Rights During a Digital Investigation?
As police rely on technology to investigate crimes, understanding your digital privacy rights is important. If investigators request access to your phone, computer, or online accounts, you can speak with a criminal defense attorney before agreeing to a search. Police often need a warrant to access private digital information, although exceptions may apply.
If you learn that your digital activity is being investigated, do not delete messages, files, or accounts. Destroying potential evidence can lead to additional charges. Instead, preserve relevant records and document any contact with investigators.
A defense attorney can review how police obtained your digital information, determine whether the search was lawful, and challenge evidence that is inaccurate or taken out of context.
Disclaimer: This article is for general informational and educational purposes only and should not be considered professional or legal advice. The information provided may not apply to every situation. Readers are encouraged to consult a qualified professional for guidance regarding their specific circumstances.
