MADISON, Wis. (AP) — Newly declassified documents show the FBI kept close tabs on Soviet dictator Josef Stalin's only daughter after her high profile defection to the United States in 1967, gathering details from informants about how her arrival was affecting international relations.

The documents were released Monday to The Associated Press under the Freedom of Information Act following Lana Peters' death last year at age 85 in a Wisconsin nursing home. Her defection to the West during the Cold War embarrassed the ruling communists and made her a best-selling author. And her move was a public relations coup for the U.S.

One April 28, 1967, memo details a conversation with a confidential source who said the defection would have a "profound effect" for anyone else thinking of trying to leave the Soviet Union. The source claimed to have discussed the defection with a Czechoslovak journalist covering the United Nations and a member of the Czechoslovakia "Mission staff."

"Our source opined that the United States Government exhibited a high degree of maturity, dignity and understanding during this period," according to the memo, prominently marked "SECRET" at the top and bottom. "It cannot help but have a profound effect upon anyone who is considering a similar solution to an unsatisfactory life in a Soviet bloc country."

When she defected, Peters was known as Svetlana Alliluyeva, but she went by Lana Peters following her 1970 marriage to William Wesley Peters, an apprentice of Frank Lloyd Wright. Peters said her defection was partly motivated by the Soviet authorities' poor treatment of her late husband, Brijesh Singh, a prominent figure in the Indian Communist Party.

Another memo dated June 2, 1967, describes a conversation an unnamed FBI source had with Mikhail Trepykhalin, identified as the second secretary at the Soviet Embassy in Washington, D.C.

The source said Trepykhalin told him the Soviets were "very unhappy over her defection" and asked whether the U.S. would use it "for propaganda purposes." Trepykhalin "was afraid forces in the U.S. would use her to destroy relationships between the USSR and this country," the source told the FBI.

An unnamed informant in another secret memo from that month said Soviet authorities were not disturbed by the defection because it would "further discredit Stalin's name and family."

Stalin, a dictator held responsible for sending millions of his countrymen to their deaths in labor camps, led the Soviet Union from 1924 until his death in 1953. Stalin's successor, Nikita Khrushchev, denounced him three years later as a brutal despot.

And even though Peters denounced communism and her father's policies, Stalin's legacy haunted her in the United States.

"People say, 'Stalin's daughter, Stalin's daughter,' meaning I'm supposed to walk around with a rifle and shoot the Americans," she said in a 2007 interview for a documentary about her life. "Or they say, 'No, she came here. She is an American citizen.' That means I'm with a bomb against the others. No, I'm neither one. I'm somewhere in between."

Another FBI source, reporting on a 1968 May Day celebration in Moscow, said "the general feeling" is that she defected "because she was attracted by the material wealth in the United States." Continued...