Defense lawyers claim that federal prosecutors withheld crucial evidence in the cases involving Samourai Wallet and Tornado Cash protocols.
The dispute revolves around whether the non-custodial protocols should be classified as money services businesses (MSBs).
Defense argues that a phone call with FinCEN stated that Samourai Wallet did not operate as an MSB, undermining the conspiracy accusation against its co-founders.
Tornado Cash case faces similar issues, with the defense team insisting that withheld evidence prejudiced the defense despite the dropping of MSB charge.