The criminal investigation unit of the United States Internal Revenue Service (IRS) has listed four crypto-related cases among the top ten of its “most prominent and high-profile investigations” in 2023.

In a Dec. 11 notice, the IRS unit said there were four significant cases in 2023 involving the seizure of cryptocurrency, fraudulent practices, money laundering and other schemes. Coming in at its third most high-profile investigation in the past year was OneCoin co-founder Karl Sebastian Greenwood, who was sentenced to 20 years in prison in September for his role in marketing and selling a fraudulent crypto asset.

Other cases included Ian Freeman, a New Hampshire resident sentenced…

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