William Lonergan Hill, co-founder of Samourai Wallet, received a four-year federal prison sentence for operating an unlicensed money-transmitting business that concealed over $237 million in illicit Bitcoin funds. This follows Keonne Rodriguez’s five-year term, highlighting U.S. crackdowns on crypto mixers aiding criminal activities. Samourai Wallet’s Whirlpool and Ricochet tools obscured Bitcoin transactions, processing 80,000 BTC