Across the nation, thousands of people began organizing a movement to gain her release. In New York City, black writers formed a committee called the Black People in Defense of Angela Davis. By February 1971 more than 200 local committees in the United States, and 67 in foreign countries, worked to free Davis from prison. John Lennon and Yoko Ono contributed to this campaign with the song "Angela". In 1972, after a 16-month incarceration, the state allowed her release on bail from county jail. On February 23, 1972, Rodger McAfee, a dairy farmer from Fresno, California, paid her $100,000 bail with the help of Steve Sparacino, a wealthy business owner. The United Presbyterian Church paid some of her legal defense expenses.
A defense motion for a change of venue was granted, and the trial was moved to Santa Clara County. On June 4, 1972, after 13 hours of deliberations, the all-white jury returned a verdict of not guilty. The fact that she owned the guns used in the crime was judged insufficient to establish her role in the plot. She was represented by Leo Branton Jr., who hired psychologists to help the defense determine who in the jury pool might favor their arguments, a technique that has since become more common. He hired experts to discredit the reliability of eyewitness accounts.
After her acquittal, Davis went on an international speaking tour in 1972 and the tour included Cuba, where she had previously been received by Fidel Castro in 1969 as a member of a Communist Party delegation. Robert F. Williams, Huey Newton, Stokely Carmichael had also visited Cuba, and Assata Shakur later moved there after escaping from a US prison. Her reception by Afro-Cubans at a mass rally was so enthusiastic that she was reportedly barely able to speak. Davis perceived Cuba as a racism-free country, which led her to believe that "only under socialism could the fight against racism be successfully executed." When she returned to the United States, her socialist leanings increasingly influenced her understanding of race struggles. In 1974, she attended the Second Congress of the Federation of Cuban Women.
The East German government organized an extensive campaign on behalf of Davis. In September 1972, Davis visited East Germany, where she met Erich Honecker, received an honorary degree from the University of Leipzig and the Star of People's Friendship from Walter Ulbricht. On September 11 in East Berlin she delivered a speech, "Not Only My Victory", praising the GDR and USSR and denouncing American racism, and visited the Berlin Wall, where she laid flowers at the Reinhold Huhn Memorial (Huhn was an East German guard who was killed by a man who was trying to escape with his family across the border in 1962). Davis said "We mourn the deaths of the border guards who sacrificed their lives for the protection of their socialist homeland" and "When we return to the USA, we shall undertake to tell our people the truth about the true function of this border." In 1973 she returned to East Berlin leading the US delegation to the 10th World Festival of Youth and Students.
On January 28, 1972, Garrett Brock Trapnell hijacked TWA Flight 2. One of his demands was Davis's release.