According to the strictures of federal law, no one can be prosecuted, be brought to trial or be subject to legal penalty for any offense that is not capital unless information is instituted or the person has been indicted within five years of committing the offense. (See 18 USC 3282)
https://www.federalcharges.com/money-laundering-laws-charges/
That’s the right law, but there is a wiggle room on the 5 years that can take it to 7.