Industry WIKI

Tornado Cash (also stylized as TornadoCash) is an open source, non-custodial, fully decentralized cryptocurrency tumbler that runs on Ethereum Virtual Machine-compatible networks. It offers a service that mixes potentially identifiable or "tainted" cryptocurrency funds with others, so as to obscure the trail back to the fund's original source. This is a privacy tool used in EVM networks

United States v. Gratkowski, 964 F.3d 307 (5th Cir. 2020), was a case in the United States Court of Appeals for the Fifth Circuit involving the Fourth Amendment implications of Bitcoin transactions.