Eyewitness testimony has long been recognized as unreliable, but criminal prosecutions in New York and New Jersey increasingly rely on a different kind of evidence: the passive data your smartphone and wearable devices generate automatically. From fitness app logs to GPS history, this electronic trail can surface in a violent crime investigation whether you are aware of it or not.
The data your device records without your input
Most people think of digital evidence as text messages or social media posts. Prosecutors often focus on background data the device collects on its own:
- Health and biometric data: apps like Apple Health and Google Fit record steps, heart rate, and elevation changes continuously; unusual activity patterns logged at the time of an alleged offense can be introduced as evidence
- GPS and location history: precise coordinates can place a device at the location of an assault or homicide, directly contradicting an alibi
- Screen activity and device interaction logs: timestamps showing when a device was unlocked or in active use can corroborate or undermine claims about a person’s whereabouts
This type of evidence can work in either direction, supporting a defense or strengthening a prosecution, depending on the facts of the case.
How prosecutors obtain digital evidence
State and federal prosecutors in New York and New Jersey use the Stored Communications Act to compel cloud backups, account data, and server-side records from technology companies. Law enforcement also executes search warrants to conduct forensic extractions directly from physical devices.
Access to this data is not unlimited. In Carpenter v. United States (2018), the U.S. Supreme Court held that obtaining historical location data generally requires a search warrant supported by probable cause under the Fourth Amendment. A defense attorney can challenge overbroad warrants, contest chain of custody, and move to suppress evidence that was obtained without proper legal authority.
What this means if you are facing charges
Digital evidence is now a routine part of violent crime prosecutions. If you are facing charges in New York or New Jersey, understanding how this evidence was obtained and whether it can be challenged is an important part of building a defense. A criminal defense attorney in New York familiar with digital evidence can review the data being used against you and identify any constitutional issues with how it was collected.