Three years after his exoneration on charges he helped hide illegal bank activity at the shuttered Hamilton Bank, Miami attorney Carlos Loumiet has filed suit against the Office of the Comptroller of the Currency, alleging he was maliciously prosecuted as revenge for whistleblowing about the federal regulatory agency.

Loumiet, a partner at DLA Piper in Miami, is seeking $4 million in damages. The suit was filed in July in Washington federal court. The suit also named OCC investigators Michael Rardin, Lee Straus, Gerard Sexton and Ronald Schneck.