CNN legal analyst Jeffrey Toobin said Thursday that recent court filings from special counsel Robert MuellerRobert (Bob) Swan MuellerThis week: Mueller dominates chaotic week on Capitol Hill Top Republican considered Mueller subpoena to box in Democrats Kamala Harris says her Justice Dept would have 'no choice' but to prosecute Trump for obstruction MORE suggest that his ongoing investigation is "increasingly focused" on President TrumpDonald John TrumpChelsea Clinton announces birth of third child Ukrainian officials and Giuliani are sharing back-channel campaign information: report Trump attacks 'the Squad' as 'racist group of troublemakers' MORE.

"All of this suggests an active criminal investigation that is increasingly focused on the president," Toobin said on CNN's "New Day."

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Mueller recommended in a court filing this week that Trump's former national security adviser Michael Flynn receive no jail time, citing Flynn's "substantial" cooperation involving "several" investigations.

Trump's former personal attorney Michael Cohen also pleaded guilty last week in Mueller's probe to lying to Congress about efforts to build a Trump Tower in Moscow during the 2016 campaign.

Toobin said Thursday that Cohen's guilty plea was as "close to President Trump as Mueller has ever come" in terms of public disclosures.

"That has to be nerve-wracking, for good reasons," Toobin said.

Toobin also noted that the court filing Mueller issued on Flynn this week was heavily redacted, indicating that Flynn helped with an ongoing criminal investigation.

"We have been talking about it as if it's wrapping up, as if it's about to be done. If it was about to be done there would be no reason to black out information about a continuing investigation," Toobin said.

He also pointed to future court filings involving former Trump campaign chairman Paul ManafortPaul John ManafortUkrainian officials and Giuliani are sharing back-channel campaign information: report Key numbers to know for Mueller's testimony Webb: Questions for Robert Mueller MORE, whom the special counsel said last week violated his plea agreement by lying to prosecutors.

"One thing I will be looking for is how much of the Manafort documents are blacked out as well," Toobin said. "I hope very little just because I am a journalist and I want to find out stuff, but it suggests that this investigation is not over."