BitTorrent and Internet Crime Investigations

BitTorrent is a file-sharing protocol used to distribute large files by breaking them into pieces shared among many users at once. It has many lawful uses, including distributing open-source software and public archives. Because files are shared openly among users, it is also a network that law enforcement monitors in child sexual abuse material investigations. This page gives general background on BitTorrent and how investigations involving it often happen.

Background and History of BitTorrent

Programmer Bram Cohen designed the BitTorrent protocol and released it in 2001. The company he co-founded, BitTorrent, Inc., later became part of Rainberry, Inc., but the protocol itself is open and is used by many independent programs, such as qBittorrent, uTorrent, and others.

BitTorrent Features and Services

A BitTorrent user opens a small .torrent file or a “magnet link” that identifies the content and its hash value. The software then finds other users (peers) sharing the same content, often through a distributed hash table (DHT) or trackers, and downloads pieces from many peers while uploading pieces to others at the same time. That simultaneous sharing is important in investigations, because it means a downloader is usually also making pieces available to others.

How People Use BitTorrent

BitTorrent is used legitimately to distribute large files quickly and efficiently. Open-source software projects such as the Ubuntu Linux distribution offer official BitTorrent downloads, the Internet Archive makes many items in its public collections available as torrents, and other organizations use the protocol to share large datasets and software without overloading a single server. Because each user shares pieces of a file with others, BitTorrent can make large downloads faster and more reliable.

How Many People Use BitTorrent?

BitTorrent, Inc. announced in January 2012 that its software had 150 million monthly active users. That figure is now historical, and because BitTorrent is an open protocol used by many programs, there is no current official count of users.

How Investigations Involving BitTorrent Often Begin

Peer-to-peer investigations work differently from investigations of social media or messaging apps. There is usually no company in the middle that detects files and reports them. Instead, law enforcement officers often connect to the network themselves using software built for investigations, look for users offering files whose hash values match known illegal material, record the IP address of the computer sharing the files, and sometimes download files directly from that single source. The officer then typically sends a subpoena to the internet provider for that IP address to learn the subscriber’s name and address, and seeks a search warrant for the home. The firm’s article on P2P investigations explains this process in more detail.

Where the Evidence Comes From in Peer-to-Peer Cases

Because there is no central company holding user records, the key records in a BitTorrent case usually come from the investigator’s own software logs (IP addresses, timestamps, hash values, and any downloaded pieces), the internet provider’s subscriber records, and devices seized during a search. How long an internet provider keeps IP assignment records varies by provider.

Connecting an IP Address to a Person

In peer-to-peer cases, the internet subscriber whose name comes back on a subpoena is not necessarily the person who used the file-sharing software. Households share connections, Wi-Fi can be used by guests or neighbors, and some software runs in the background and shares files automatically. Questions about whether files were actually viewed, whether a person knew a program was sharing them, and how investigative software recorded and verified a download can all matter. See also questioning the biography of a digital file.

Examples From Reported Cases

The examples below are drawn from public announcements and news reports. They are described generally and without names. Charges are only accusations, and anyone charged is presumed innocent unless proven guilty in court. These summaries are not a prediction of how any other case will turn out.

• In Virginia, law enforcement learned that illegal files were available for download on BitTorrent from an IP address associated with a man’s residence. Federal agents searched the home in 2023, and forensic analysis allegedly confirmed downloads from BitTorrent. He pleaded guilty in 2025.
• In Florida, a man was convicted at trial in 2024 after an Internet Crimes Against Children task force investigation of peer-to-peer sharing. In 2025, a federal appeals court rejected his argument that law enforcement needed a warrant before using special BitTorrent software to download files he had made publicly available. That ruling applies in that federal circuit; courts elsewhere may analyze such questions differently.

Related Articles on InternetCrime.com

• Platform Investigations: all platforms
• Peer-to-Peer (P2P) Investigations
• Child Pornography Defense
• Possession Charges
• Distribution Charges
• Questioning the Biography of a Digital File
• Police Seized My Computer: What Now?

If You Are Under Investigation Involving BitTorrent

If police have contacted you, if a search warrant has been served, or if you believe an investigation involving a BitTorrent account may be underway, it is important to get legal advice before taking any action on your own. Attorney Ron Frey generally advises speaking with an attorney before answering questions or agreeing to a search. Whether a person may be required to provide a password or unlock a device depends on the circumstances, the jurisdiction, and any search warrant or court order involved, so that decision should be made with an attorney’s advice (see should I provide my password to the police or FBI?).

You have the right to remain silent. Anyone accused of a crime is presumed innocent unless proven guilty in court. Laws change and vary from state to state and between state and federal court, and the way they apply depends on the specific facts. Please don’t rely on the internet or on AI tools to evaluate your situation. Every case is different, and contacting an attorney is a priority to get tailored advice.

Attorney Ron Frey of The Frey Law Firm, LLC has been practicing law for over two decades and represents people nationally in internet and computer crime investigations and charges. He is a conference speaker and published author.

Attorney Ron Frey Is Available for a Free Initial Confidential Consultation: Call or Text (844) 766-3739. In Florida, call (813) 775-2276. You can also reach the firm through the contact page.

References

• TechSpot, “BitTorrent announces 150 million monthly users” (Jan. 2012)
• U.S. Department of Justice, Office of Public Affairs, Virginia BitTorrent case (Apr. 2025)
• U.S. Attorney’s Office, Northern District of Florida, press release on appeals decision (June 2025)
• Ubuntu, Alternative downloads (BitTorrent)
• Internet Archive Help Center, Archive BitTorrents
• Wikipedia, “BitTorrent” (background)

Important: This page provides general information only. It is not legal advice, and it is not a complete or current statement of the law or of any company’s policies. Laws, court decisions, and platform practices change, and their effect depends on the facts of each case and on how courts interpret them. User figures and report counts come from the sources listed and may since have changed. Platform names and logos are trademarks of their owners and are used only to identify the services discussed; The Frey Law Firm, LLC is not affiliated with or endorsed by any of these companies. Please don’t rely on this page, or on any other information online, to make decisions about your situation. Talk with a lawyer. Reading this page or contacting The Frey Law Firm, LLC does not create an attorney-client relationship. Last reviewed: October 26, 2026.