John Walker Jr.

John A. Walker Jr. is escorted into the Montgomery County Detention Center in Rockville, Md., after a pretrial hearing in Baltimore in 1985. (Ron Edmonds / Associated Press)

Aug. 29, 2014 3:52 PM PT

John Walker Jr., a former Navy sailor convicted of leading a family spy ring, died Thursday at a Federal Medical Center in Butner, N.C.

John A. Walker Jr., left, convicted of masterminding a family spy ring, leaves a hearing in 1985. (Bob Daugherty / Associated Press)

Convicted spy Arthur Walker is escorted into court in Norfolk, Va., on Nov. 12, 1985. Arthur Walker made $12,000 for selling classified documents to Soviet agents through his brother John Walker Jr. Arthur Walker also died in prison. (Steve Helber / Associated Press)

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John Walker Jr.

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