Early Wednesday morning, Roger Stone was indicted by a grand jury on charges brought by special counsel Robert Mueller, becoming the sixth individual with ties to Donald Trump charged in the Russia investigation.

Of the six Trump associates, two have been sentenced to prison.

Here are the six Trump associates that have been charged in the Mueller probe:

Mueller has brought criminal charges 37 people and entities since he began his work in May 2017. The majority of the cases are against Russians who likely won't ever step foot in the United States.