Stranger has a great clip from YouTube on Rep Marcy Kaptur, D-Ohio (Toledo)
Basically she is calling for criminal prosecutions, where warranted, and confiscation of assets.
FWIW, that's really the only option we have.
Curiously, she suggests going back as far as 15 years - a time frame similar to one that I'd use in Washington State for not unrelated problems.
Personally I think we should also look for civil recovery of assets, though we do need to be very careful about legal standards and precendents in such 'property rights' matters.