Convicted spy pleads guilty to new charges, faces more prison time

(CNN) -- A former CIA officer already serving a 23-year sentence for spying for the Russians is facing more time in prison after pleading guilty to continuing his espionage activities from behind bars.

Harold James "Jim" Nicholson, 59, changed his plea to guilty Monday at a federal court hearing in Portland, Oregon, the Justice Department said in a statement.

Nicholson pleaded guilty in 1997 to spying for Russia and is the highest-ranking CIA officer ever to be sentenced for espionage. While serving his prison sentence in Oregon, prosecutors allege, Nicholson restarted his career as a double agent and enlisted his son Nathan in his efforts to collect money owed to him by the Russian spy services and to sell more secrets.

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