Cryptocurrency Crimes and Seizures

At The Mayberry Law Firm, we represent people facing federal investigations tied to cryptocurrency, including cases involving alleged fraud, money laundering, unlicensed money transmitting, and wallet-based seizures. If you are searching for a Tampa federal criminal defense attorney because agents contacted you about Bitcoin, Ethereum, stablecoins, or a crypto exchange account, you are probably dealing with a case built from data rather than eyewitnesses. That can be a problem for the government when the story is wrong, but it also means early mistakes—like talking to agents or moving funds—can make things worse fast.

How Crypto Investigations Usually Start

Many crypto cases begin quietly. A bank files a report about unusual transactions. An exchange responds to a subpoena. A blockchain analytics firm flags a wallet cluster. Then agents connect on-chain activity to off-chain identity using KYC records, IP logs, device data, and chat histories. By the time you receive a target letter or a grand jury subpoena, investigators often have months of records.

If agents call, do not try to talk your way out of it. A casual interview can become a false statement charge. If they ask to “take a look” at your phone or laptop, decline and call counsel.

Common Charges in Federal Crypto Cases

Crypto is not illegal, but prosecutors use traditional statutes to charge alleged misconduct. Common allegations include wire fraud, bank fraud, money laundering, structuring, conspiracy, and operating an unlicensed money transmitting business. Some investigations also involve computer crime allegations tied to unauthorized access or account takeovers.

The key point is that federal charges often focus on intent and knowledge. A defense that shows legitimate purpose, lack of control, or flawed attribution can change everything.

What “Seizure” Means with Cryptocurrency

Seizure is not always agents taking cash from a safe. In crypto cases, seizure often means the government obtains private keys, compels an exchange to freeze an account, or takes control of tokens through warrants served on custodians. Sometimes it happens with no warning. Other times it happens after a search warrant at your home, with agents copying devices and looking for seed phrases.

Once assets are seized, the government may also seek forfeiture, even if the criminal case is still early. That is why forfeiture strategy should be built alongside the defense from the start.

How the Government Tries to Tie a Wallet to You

Attribution is the central battlefield. Prosecutors often argue that a particular wallet is yours because of exchange logins, KYC records, IP addresses, device fingerprints, and on-chain clustering. Those connections can be wrong.

Shared devices, VPN use, compromised accounts, reused addresses by third parties, or a wallet controlled by a business partner can break the chain. Even when you created a wallet, it does not always mean you controlled it at the time of the transactions being charged. The defense is often about narrowing control to the right person at the right time.

Blockchain Analytics Are Not the End of the Story

Analytics can show patterns, but they are not a confession. The government’s tools depend on assumptions about clustering, change addresses, mixers, and transaction flows. Some tools are proprietary, and their error rates are not always transparent. We pressure-test methodology, request underlying data, and, when needed, use independent experts to challenge the government’s conclusions. If an investigator cannot explain the method clearly, it becomes harder to sell to a judge or jury.

Exchanges, KYC, and the Paper Trail You Didn’t Know You Left

Most people do not realize how much data exists around their crypto activity. Exchanges maintain identity verification records, login histories, device identifiers, linked bank accounts, withdrawal addresses, and customer support communications. Even decentralized activity often touches a centralized point at some stage, whether for fiat on-ramps, stablecoin issuance, or off-ramps.

A strong defense uses that same data to establish timing, show who had access, prove legitimate sources, and identify inconsistencies in the government’s narrative.

Search Warrants, Devices, and Seed Phrases

In crypto cases, devices are often the “scene of the crime.” Agents seek phones, laptops, hardware wallets, paper backups, and screenshots of seed phrases. Warrants must be specific, supported by probable cause, and executed within scope. If a warrant is overbroad or stale, suppression becomes possible.

We also look closely at how devices were imaged and handled. Chain of custody, hashing, and forensic protocols matter because a corrupted image or sloppy handling can undermine reliability. If your case involves recorded communications or Title III wiretaps, the same discipline applies. The government must prove necessity and minimization, not just suspicion.

How Forfeiture Works in Crypto Cases

Forfeiture often becomes a parallel fight. Prosecutors may seek a money judgment for alleged proceeds and then try to satisfy it through seized tokens or substitute assets. They may also pursue civil forfeiture if criminal charges are delayed. Timing matters. Missing a notice deadline can cause forfeiture by default.

We fight forfeiture by challenging nexus, tracing, valuation, and procedure. We also work to prevent double counting with restitution, so you are not punished twice for the same alleged loss.

What You Should Do Right Now

Do not move or consolidate funds because you are scared. That can be framed as concealment. Do not delete apps, reset devices, or wipe chats. Do not respond to exchange compliance teams without counsel. Preserve everything and keep your access stable.

If you have received a subpoena, a target letter, or a seizure notice, gather it and call a lawyer who handles federal investigations. The pre-charge window is where strategy has the most leverage.

Local Focus in the Middle District of Florida

Crypto investigations in the Middle District of Florida often run through federal agencies operating out of the Tampa Division and surrounding offices, with cases filed in Tampa, Orlando, Jacksonville, Ocala, or Fort Myers. That regional structure affects the pace of subpoenas, detention decisions, and how discovery is produced. Knowing those patterns helps you act early instead of reacting late.

Talk to The Mayberry Law Firm

If you are being investigated for a cryptocurrency-related offense or your assets were seized, you need a plan that addresses both the criminal case and the money side of it. Call The Mayberry Law Firm at (813) 444-7435 or reach out online to schedule a confidential consultation. We will take over communications, pressure-test the government’s attribution theory, and move quickly to protect your rights and your property.