Paul Manafort, President Trump's former campaign manager, is being investigated special counsel Robert Mueller for his actions spanning 11 years.

Mueller, who is leading the federal Russia probe into Russian interference in the 2016 election and possible collusion between the Trump campaign and the Kremlin, has told Manafort his team intends to charge him with possible tax and financial crimes, according to CNN.

This indicates the investigation is in the advanced stages and also signals the scope had exceeded Russia interference in the election.

In July, the FBI conducted a search of Manafort's home. The search warrant said the investigation covered potential crimes that were committed starting in 2006, according to CNN.

Manafort has claimed he did nothing wrong concerning his Ukraine-related payments, his bank accounts in offshore tax shelters, and his various real estate transactions over the years.

Mueller's team has subpoenaed a significant quantity of financial records from Manafort. Additionally, Mueller has subpoenaed for documents the FBI took during their search.

Manafort, who was present at the June 2016 meeting with a Russian lawyer who had ties to the Kremlin, also had his notes from the meeting confiscated by Mueller. The lawyer promised to provide negative information on Hillary Clinton, however, the notes indicate the lawyer primarily discussed complaints about William Browder and his effort to push sanctions legislation.