Federal regulators fined Gibraltar Private Bank & Trust Co. a combined $6.5 million for willfully violating federal anti-money laundering laws as part of disbarred attorney Scott Rothstein’s Ponzi scheme.

The Treasury Department’s Financial Crimes Enforcement Network, which ordered a $4 million fine, faulted the Coral Gables-based bank for handling nearly $558 million in suspect transactions from 2009 to 2013.