Washington (CNN) Former New York City Mayor Rudy Giuliani went after special counsel Robert Mueller's team on Sunday, calling the investigators "unfair" to his client, President Donald Trump.

Giuliani, speaking on CNN's "State of the Union," even went as far as to characterize one member of Mueller's team as a "hitman" as he described the special counsel's prosecutors as "people who were unfair to [Trump], people who wrote an unfair report, people who came close to torturing people to get information and break them."

After brief push back, Giuliani referred to the incarceration of former Trump campaign chief Paul Manafort, who was in solitary confinement as he awaited trial, according to his attorneys.

"How about having Manafort in solitary confinement and questioning him 13 times?" Giuliani said. "Maybe torture is too much."

Giuliani then mentioned Andrew Weissmann, a former prosecutor who helped lead the Enron investigation and one of the earliest members of the Mueller team, as someone he took particular issue with.

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