Longtime Trump associate Roger Stone was sentenced to 4o months in prison for crimes that include obstruction of justice, lying to Congress and witness tampering.

Why it matters: Stone is the seventh person to be convicted and sentenced for crimes unearthed by former special counsel Robert Mueller's investigation. His case has been at the heart of ongoing tensions between President Trump and his Justice Department.

The big picture: Suspected criminal activity among Trump associates extends beyond Mueller’s Russia probe. Federal prosecutors are investigating the president's personal lawyer Rudy Giuliani's personal business dealings in Ukraine.

Sentenced:

Awaiting sentencing:

Former national security adviser Michael Flynn: The retired three-star general pleaded guilty to lying to the FBI in Dec. 2017.

Go deeper... Timeline: Every big move in the Mueller investigation