Former CIA director John Brennan, a leading critic of President Donald Trump, admitted Monday he suspected there was more that would come out of special counsel Robert Mueller's investigation.

'I don't know if I received bad information but I suspected there was more than there actually was. I am relieved that it's been determined there was not a criminal conspiracy with the Russian government over our election,' Brennan said on MSNBC's 'Morning Joe.' 'I think that is good news for the country.'

Mueller concluded that Trump and his campaign did not collude with Russians in order to improve his chances of beating Democrat Hilary Clinton.

Former CIA director John Brennan admitted he suspected there was more that would come out of special counsel Robert Mueller's investigation

Brennan has been one of President Donald Trump's leading critics

The special counsel did not draw a conclusion 'one way or the other' as to whether the president obstructed justice, according to the findings, but left that decision to Attorney General William Barr, who decided along with Deputy Attorney General Rod Rosenstein not to pursue that charge.

Brennan has been a fierce critic of the president.

He wrote in an August op-ed for The New York Times: 'Mr. Trump's claims of no collusion are, in a word, hogwash.'

Brennan said Monday there are still questions to be answered and pointed to an ongoing investigation into the president's business dealings by the Southern District of New York.

'I still believe there are a lot of questions that need to be answered, questions about why he's lied so much and so often. I do think he, Donald Trump is concerned that opening up an investigation on criminal conspiracy about working with the Russians would open up a Pandora's box of other type of things that come ply indicate him and I think the referrals by Bob Mueller to the Southern District of New York and other places demonstrate there's a lot of investigative threads that could implicate Mr. Trump,' he said on MSNBC.

Brennan cast off his normally tight-lipped persona to become one of President Trump's harshest critics after he ended his tenure at America's top spy agency.

In one example, he retweeted Trump in January, writing: 'Your cabal of unprincipled, unethical, dishonest, and sycophantic cronies is being methodically brought to justice. We all know where this trail leads. If your utter incompetence is not enough to run you out of office, your increasingly obvious political corruption surely will.'

He predicted the Mueller probe could ensnare Trump family members. He predicted, incorrectly, that Mueller would bring additional indictments dealing with criminal conspiracy.