Law enforcement agencies have increasingly sophisticated tools for monitoring and documenting internet activity. They can track the websites you visit, the files you download, the searches you perform, and the communications you send often without you knowing. This evidence frequently forms the foundation of criminal cases involving CSAM, online solicitation, fraud, and other internet-related offenses.
Understanding how police track online activity is the first step in understanding how to challenge it.
Methods Law Enforcement Uses to Track Online Activity
Internet Service Provider Records
Your internet service provider (ISP) maintains records of your internet activity, including the IP addresses you’ve been assigned, connection times, and in some cases, browsing history and download records. Law enforcement can obtain these records through subpoenas, court orders, or search warrants depending on the type of information sought.
Search Warrants for Devices
When law enforcement seizes a computer or phone, forensic analysis can reveal a detailed history of internet activity: browser history, cached web pages, download history, cookies, stored passwords, and search engine queries. Even activity the user thought they deleted may be recoverable through forensic analysis of the device’s storage.
Peer-to-Peer Network Monitoring
In CSAM and file-sharing cases, law enforcement actively monitors peer-to-peer networks like BitTorrent and eMule. They use specialized tools, including Torrential Downpour, Roundup Ares, Roundup eMule, and E2P2, to identify IP addresses sharing specific files. When a user’s IP address is captured sharing a file with a known hash value matching illegal content, law enforcement traces the IP address to a subscriber through the ISP.
Network Investigative Techniques (NITs)
NITs are government-deployed tools that are installed on a suspect’s device, often through a compromised website, to identify the user’s real IP address, MAC address, and other identifying information. NITs have been used extensively in cases involving the dark web and hidden services.
Undercover Operations
In online solicitation and trafficking cases, law enforcement officers pose as other individuals online such as minors, as buyers, or as sellers to build cases against targets. All communications during these undercover operations are recorded and preserved as evidence.
Challenging Internet Activity Evidence
Fourth Amendment Challenges
Every method of online surveillance is subject to Fourth Amendment scrutiny. Doug evaluates whether law enforcement obtained proper legal process for each piece of evidence: Was a warrant required? Was the warrant supported by probable cause? Did the warrant specifically authorize the type of surveillance that was conducted?
IP Address Does Not Equal Identity
An IP address identifies a connection point, not a person. Multiple people in a household, business, or public Wi-Fi network share the same IP address. The fact that illegal activity was traced to a particular IP address does not prove that the defendant was the person engaged in that activity.
Shared Devices and Networks
Computers and networks used by multiple people create reasonable doubt about who was responsible for the activity in question. An investigation includes device access patterns, user accounts, login history, and network sharing to determine whether someone other than the defendant could have been responsible.
Tool Reliability
The forensic tools used by law enforcement are not infallible. They may produce false positives, misinterpret data, or capture information inaccurately.
Talk to a Defense Team That Understands Digital Evidence
At Deandra Grant Law, Douglas Huff is Criminal Division Chief who has completed advanced training in digital forensics with Garrett Discovery, one of the nation’s leading digital forensics firms. Doug doesn’t just read the prosecution’s forensic reports. He has the training to understand the tools, challenge the methods, and expose the weaknesses in digital evidence.
If you are facing criminal charges involving digital evidence of any kind, contact Deandra Grant Law for a free, confidential consultation.
Call (214) 225-7117 or schedule an appointment online at texasdwisite.com.