Both face up to 20 years in jail and a $250,000 fine on the most serious charge, the racketeering count.
The racketeering count, the most serious charge, carries a maximum 20-year prison term.
Each racketeering count carries a maximum prison sentence of 20 years.
He pleaded guilty to a count of racketeering and is due to be sentenced on April 1.
In January 1993, a federal conviction followed, on 73 counts of fraud, racketeering and conspiracy.
He was indicted in March 1989 on 98 counts of racketeering, securities fraud and other charges.
He was charged in March with 98 counts of racketeering, securities fraud and other violations.
Had Masella lived, he probably would have been indicted on numerous counts of racketeering.
Harding's former husband has pleaded guilty to one count of racketeering for his involvement in planning the attack.
Noriega was tried on eight counts of drug trafficking, racketeering, and money laundering in April 1992.