In March 1945, Gehlen and his officers microfilmed the extensive documentation on the U.S.S.R., concealed the film, and buried it at the Austrian alps.

Finally, on May 22nd, 1945, Gehlen and his top aides surrendered to the Counter Intelligence Corps of the U.S. Army, and were then taken to Fort Hunt, Virginia, near Washington, D.C. Along with him, the U.S., through Operation Paperclip, also brought people like [Axis] rocket scientist Wernher von Braun, who would later work for NASA.

A year later, Gehlen and his staff were brought back to Germany at Camp King in Oberursel, near Frankfurt, for interrogation and dealmaking. American interrogators were delighted when Gehlen eventually provided them with the hidden records.

The CIA remained vague about where Gehlen got that information from. In fact, he got much of it through his rôle in one of the most vicious atrocities of the war; the interrogation, torture, and murder (by starvation), of approximately four million Soviet prisoners of war.

But there was an annoying problem with this plan: the Yalta Agreements obligated the U.S. to surrender Axis officers involved in Eastern Area Activities to the Soviets, but the Americans didn’t really bother. The U.S. acknowledged Gehlen’s potential as an exceptional spymaster and hunter of communists, equipped with a network of anticommunist intelligence contacts.

Gehlen struck an attractive deal with the Americans: in return for his freedom, he would assist them in the fight against communism. So basically, a deal with no downsides for either party.

ETA: All of the U.S.’s intel for more than a decade after 1945 came exclusively through the Third Reich’s Eastern Front intel organization.

Program highlights include: Gehlen’s central rôle in the creation of Radio Free Europe; Gehlen’s employment of Eichman’s superior in the Final Solution, Otto Von Bolschwing; the BND’s employment of Eichmann’s deputy Alois Brunner; the appointment of Von Bolschwing associate Helene Von Damm to serve as White House specialist for Presidential personnel; Skorzeny’s creation and training of […] terrorist groups while serving on the Gehlen‐CIA mission in Egypt in the 1950s; Gehlen’s use of Adolph Eichmann in the Skorzeny/CIA/Gehlen mission in Egypt; text of a rare interview with Gehlen, in which he demonstrated his unreconstructed [Fascist] sympathies; Gehlen’s pivotal rôle in the establishment of Radio Free Europe; a history of Gehlen operative Helmut Streicher, a former SS officer, whose intelligence activities ranged from the Eastern Front in World War II to the Bay of Pigs invasion; Gehlen’s work as a minister in “the Evangelical Church,” following his alleged retirement from the BND (Germany’s intelligence service and the final incarnation of Gehlen’s [Fascist] spy outfit.

(Emphasis original. Source.)

Fair warning that this programme is nearly three hours long, so you may wish to listen to it later when you have time!