Tuesday afternoon, Alex van der Zwaan became the first person to receive sentencing in Special Counsel Robert Mueller's probe, receiving 30 days in prison and $20,000 in fines.

Why it matters: There four other subjects who have pleaded guilty and have yet to receive their sentence. Meanwhile, Paul Manafort has stuck with his "not guilty" plea and will go to trial in September.

Charge: Lying to the FBI

Lying to the FBI Plea: Guilty

Guilty Potential sentence: 0 to 6 months, sentencing hearing date is expected to be announced on May 1.

Charge: Bank fraud, conspiracy, lying on taxes, money laundering, failing to register as foreign agent.

Bank fraud, conspiracy, lying on taxes, money laundering, failing to register as foreign agent. Plea: Not guilty

Not guilty Potential sentence: TBD, trial begins Sept. 17

Charge: Failing to register as foreign agent, bank fraud, conspiracy, lying on taxes, lying to the F.B.I.

Failing to register as foreign agent, bank fraud, conspiracy, lying on taxes, lying to the F.B.I. Plea: Guilty to one count of conspiracy and lying to the F.B.I.

Guilty to one count of conspiracy and lying to the F.B.I. Potential sentence: 57 to 71 months

Charge: Lying to the FBI

Lying to the FBI Plea: Guilty

Guilty Potential sentence: 0-6 months

Charge: Identity fraud

Identity fraud Plea: Guilty

Guilty Potential sentence: Up to 15 years