Former federal prosecutor Andrew McCarthy said the indictment of Roger Stone underscores the fact that there is still no evidence of a criminal conspiracy between the Trump campaign and Russia.

Stone, a former adviser to President Trump, was taken into custody in Florida on Friday after being indicted by a federal grand jury the day before on charges of obstruction, making false statements and witness tampering.

On "Fox & Friends" Monday, McCarthy said Stone's indictment -- like every other indictment thus far in Special Counsel Robert Mueller's investigation -- alleges no involvement by Stone or the Trump campaign in Russia's hacking of Democratic email accounts.

'It Was Just a Show': Dershowitz Says Stone's Arrest Was to Get Info on 'Real Target' Pres. Trump

"If Trump and his campaign were in a criminal conspiracy of espionage with Russia, if they had colluded with Russia, why would the campaign have had to turn to Roger Stone to find out what WikiLeaks had?" McCarthy said. "They would have known that from Russia, they wouldn't have needed people like Roger Stone."

He argued that each indictment in the Mueller probe disproves the proposition that was the rationale for the investigation: that there was a conspiracy between Trump and Russia.

"All that's happened in all the ensuing months since March of 2017 is day after day after day it becomes less and less likely -- in fact, it becomes more and more clear -- that there was no conspiracy between the Trump campaign and Russia."

Watch more from McCarthy above.

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