Can police track my online activity?

The question of whether police can track online activity encompasses various aspects of data collection and privacy rights. Generally, law enforcement agencies require judicial approval to access non-public data from an individual's electronic devices, including phones and computers. This process often involves obtaining a warrant, which necessitates demonstrating probable cause to a court. Tracking online activity can include accessing basic subscriber information linked to an individual's IP address and billing details. Such information typically requires subpoenas or court orders. Additionally, law enforcement may seek access to stored communications, including emails, text messages, direct messages, cloud data, search history, and location history. In most cases, a warrant is necessary for these types of data, based on probable cause established by the law enforcement agency. In California, specific protections are afforded to digital communications under the California Electronic Communications Privacy Act (Cal ECPA). This state law mandates that law enforcement generally must obtain a warrant before accessing any electronic communication content or device information. While there are exceptions to this requirement, the overarching principle is that police cannot track an individual's online activity without a substantial justification that can be presented to a court for approval.