"Right now she is being protected by a rigged system. It's a totally rigged system," Republican presidential candidate Donald Trump said regarding FBI Director James Comey's decision not to prosecute Democratic rival Hillary Clinton.

Comey submitted a controversial letter to Congress on Sunday, signaling that the FBI was finished with their investigation into Clinton's irresponsible homebrew email server. But as frustrating as the decision is for Clinton opponents, the FBI might have a surprise still in store for the Clintons.

The FBI isn't done investigating – not by a long shot. And it could mean jail time.

Multiple sources within the FBI have leaked information over the past week that federal agents are deep into an investigation into the Clinton Foundation. It is totally separate from the FBI's investigation into the Clinton's email server – and rumors have said that an indictment could be coming soon.