Sure the SEC, does not have broad enforcement powers but most federal agencies don't. The FBI famously chases down serial murderers, but they can't charge them

Sure the SEC, does not have broad enforcement powers but most federal agencies don't. The FBI famously chases down serial murderers, but they can't charge them with crimes either. Most agencies have a police wing, but like most police, they refer your case to the DA who may charge you. If Citi isn't charged here, then it's the DOJ at fault. They got the investigation report and chose not to act.