A former CIA agent serving time at an Oregon prison for spying for the Russians was indicted Thursday on new espionage charges together with his son.

Harold James Nicholson, 58, was brought from his Sheridan prison cell to a Portland federal court in shackles as was his son Nathan, 24, to face charges of collecting and receiving payments from the Russian Federation for classified information passed by the convicted spy to Moscow in the 1990s.

The indictment papers unsealed Thursday accused both of conspiracy to act as agents of a foreign government, acting as agents of a foreign government, money laundering and conspiracy to commit money laundering. They face 20-year sentences if convicted.

According to the indictment papers, the elder Nicholson used his son, a disabled Army veteran and former pizza restaurant staff, to collect the payments for his past service to Russia. The younger Nicholson traveled to different parts of the world from 2006 to 2008 to meet with Russian agents and collect thousands of dollars in cash.

A co-inmate of the spy learned Nicholson's schemes and told it to a paralegal officer, who in turn tipped the FBI. The FBI then tracked the travels of Nicholson's son to gather evidences.