However, problems of land tenure continued. In fact, these became worse in certain areas. Among the remedial measures enacted was Republic Act No. 34, likewise known as the Tenant Act, which provided for a 70–30 sharing arrangements and regulated share-tenancy contracts. It was passed to resolve the ongoing peasant unrest in Central Luzon. Amnesty Proclamation President Roxas, on January 28, 1948, granted full amnesty to all Philippine collaborators, many of whom were on trial or awaiting to be tried, particularly former President José P. Laurel (1943–1945). The Amnesty Proclamation did not apply to those collaborators, who were charged with the commission of common crimes, such as murder, rape, and arson. The presidential decision did much to heal a standing wound that somehow threatened to divide the people's sentiments. It was a much-called for measure to bring about a closer unity in the trying times when such was most needed for the progress of the nation. Civil War After persecuting the Hukbóng Bayan Laban sa Hapón, Roxas opened peace talks with the Huks and invited a delegation of Huk leaders led by Juan Feleo to come to Manila in August 1946. While returning to their jungle bases, Felco and the other Huk leaders were ambushed by police forces, with Felco's head was found floating in the Pampanga River. The ambush was intended to cripple the Huks, but instead led to a civil war as the police and the army rapidly lost control of much of Luzon to the Huks. Strongly opposed to the guerrilla movement Hukbó ng Bayan Laban sa Hapón (Nation's Army Against the Japanese, also called "the Huks"), Roxas issued a proclamation outlawing the Huk movement on March 6, 1948. At the same time, Roxas pardoned the Filipinos who had collaborated with the Japanese. The pardon of the collaborators lent some substance to the charge by the Huks that his administration was a continuation of the wartime collaborationist puppet government. The Central Intelligence Agency in a report noted that the Philippines was dominated by "an irresponsible ruling class which exercises economic and political power almost exclusively in its own interests". Secretary of State Dean Acheson complained that the Philippines was one of the most corrupt nations in Asia as he commented with some understatement "much of the aid to the Philippines has not been used as wisely as we wish it had". Acheson wanted to cease aid to the