The charges each defendant in Mueller's probe is facing

Robert Mueller walking downstairs with his hand to his chin
Photo: Alex Wong / Getty

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.