Washington (CNN) Special counsel Robert Mueller had a busy summer, the highlight being the investigation's first jury trial, brought against former Trump campaign chairman Paul Manafort. But despite calls for him to end the probe by the beginning of September, Mueller's team is on track for an even busier fall.

Here's a breakdown of what to expect from the ongoing criminal investigation:

Another major Manafort trial

The dust has now settled in Alexandria, Virginia, where a jury convicted Manafort of eight counts of financial fraud. But another Manafort trial is looming across the Potomac River in Washington.

That trial is scheduled to begin on September 17 and is expected to last longer than the Virginia case, which created a month-long stream of damaging headlines for Trump's campaign chairman.

In the Washington case, Manafort is accused of illegally lobbying for the government of Ukraine, money laundering, and allegedly tampering with potential witnesses. Has pleaded not guilty to the charges.

It's unlikely that Manafort's Trump campaign role will factor into the trial -- the alleged crimes predate his work for Trump. But some unsavory details could surface, as they did during the Virginia case.

Sentencing for Papadopoulos, Cohen

Trump campaign adviser George Papadopoulos, the lower-level staffer dubbed by Trump allies as a "coffee boy," will soon learn his fate and whether he will go to prison for lying to investigators.

His sentencing is scheduled for September 7. Prosecutors want him to serve six months in prison.