ALBANY, N.Y. (AP) — Pete Seeger’s 1942 letter to the California American Legion denouncing a proposal to deport all Japanese-Americans triggered an FBI investigation that lasted three decades. Nearly 1,700 pages from Seeger’s FBI file have been released by the National Archives under the Freedom of Information Act. Seeger had been drafted and the Army intercepted Seeger’s mail to his fiancee. Authorities also scoured his school records, talked to his father, interviewed an ex-landlord and questioned his pal Woody Guthrie. Investigators raised red flags over Seeger’s association with Lead Belly, who was labeled a “negro murderer.” More documents on Seeger are expected to be released later.