Authorities found nearly $20 million hidden in a box spring.
Federal agents seized the money earlier this month in Westborough while investigating a massive internet phone service pyramid scheme.
The case goes back to 2014, when investigators searched Telexfree Headquarters in Massachusetts.
Carlos Wanzeler and his co-founder James Merrill plead guilty last October to charges they operated a pyramid scheme and are awaiting sentencing.
Agents seized the hidden cash by following a man suspected of being a carrier for Wanzeler’s nephew.
According to federal authorities, Cleber Rene Rizerio Rocha, 28, was charged in a criminal complaint with one count of conspiring to commit money laundering.