Washington (CNN) Paul Manafort defrauded banks, the IRS and other federal authorities out of greed, and thus should spend perhaps all his remaining years alive behind bars, special counsel Robert Mueller's office said Friday night.

In a 26-page outline of his crimes and convictions for financial crimes, prosecutors make plain how high-flying Manafort believed he was, lifted for years by millions of dollars in secret income and a lifestyle of excessive spending. The penalty should be severe, they write.

Thus, the former Trump campaign chairman deserves 19.5 years to 24.5 years in prison for his conviction for eight financial crimes, Mueller's office said.

Manafort, 69, was convicted by a Virginia jury last August for bank fraud, tax fraud and other financial crimes related to the money he earned working for Ukrainian politicians.

"In the end, Manafort acted for more than a decade as if he were above the law, and deprived the federal government and various financial institutions of millions of dollars," prosecutors wrote. "The sentence here should reflect the seriousness of these crimes, and serve to both deter Manafort and others from engaging in such conduct."

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