Willem Leonard Oltmans (addressed as William Oltmans in some English publications; 10 June 1925 – 30 September 2004) was a Dutch investigative journalist and author active in international politics.

Due to the highly critical stance he often took towards Dutch foreign policy, as of 1956, the Dutch government conspired to keep him out of work. A lengthy lawsuit (1991–2000) involving the Royal family led to the state having to pay him damages.

Early life

Oltmans was born into a wealthy family with roots in the Dutch East Indies. During the Second World War he was a member of the Dutch Resistance. "We blew up a German train," Oltmans told the Dutch daily Reformatorisch Dagblad in 2003. "Hitler called me a terrorist, but I saw myself as a freedom fighter."

He studied at Nyenrode Business University (1946) and Yale University (1948), without graduating. Originally intent on a career with the diplomatic corps of the foreign service, he ended up working in press offices in the Netherlands (1953–1955). He was a close confidant of both Beatrix and Gertrude Büringh Boekhoudt (24 March 1893 – 3 September 1982) who had been Crown Princess Beatrix's tutor since April 1951. He married in 1955 and worked as a freelance reporter in Rome in 1956 for De Telegraaf when he interviewed and befriended Indonesian president Sukarno during Sukarno's trip to Italy in 1956. This started his career as a controversial journalist which the Dutch Security Service would closely watch for many decades. Once he became a confidant of Sukarno and part of his inner circle he took it upon himself to convince the broader public in the Netherlands of the legitimacy of Sukarno's viewpoints. In 1957, he pleaded for the transfer of Dutch New Guinea to Indonesia while in Indonesia. He claimed to have prevented a Dutch war against Indonesia over New Guinea by sending a memo to US president. Subsequently Joseph Luns, Minister of Foreign Affairs, covertly tried everything to sabotage Oltmans' career, with considerable success: for a long time, Oltmans was forced to live off welfare. Luns, who now had become Oltmans' nemesis, called him a 'one engine mosquito'. In 1995, Oltmans published his book My friend Sukarno.

He fought a long lawsuit (1991–2000) against the Dutch state, which he eventually won. In 2000, a commission awarded him eight million guilders (four million dollars) in damages, after taxes. Having paid two million guilders in lawyer's fees, Oltmans bought a penthouse on a canal in Amsterdam and a Steinway piano.

Kennedy conspiracy

thumb|right|220px|Willem Oltmans during his last public performance at the [[Universiteit Maastricht (22 April 2004)]]

Oltmans was based in the US in the 1960s, where he worked as a reporter for Dutch TV broadcaster NOS and lobbied members of the President Kennedy's administration regarding New Guinea. Further investigation led him to Oswald's acquaintance George de Mohrenschildt. However, the film, which was kept at Hilversum, disappeared in 1975. On 3 March 1977, De Mohrenschildt and Otlmans flew to the Schiphol Airport in the Netherlands where De Mohrenschildt had left his luggage, money and keys at Oltmans home and then, a few days later, flew together to Brussels where they had a 12:30 lunch date with a Soviet diplomat with whom De Mohrenschildt conversed with in Russian and abruptly left the table but Oltmans never saw De Mohrenschildt again.

On 29 March 1977, De Mohrenschildt was found dead at his daughters home in Florida due to an apparent self-inflicted shotgun wound via the mouth. Oltmans stated that a taped recording of the event existed in which footsteps can be heard, followed by the sound of a shotgun discharging, and then footsteps heard again. Oltmans testified for three hours behind closed doors and told the committee that De Mohrenschildt told him he had discussed the assassination of Kennedy with Lee Harvey Oswald from A to Z. "De Mohrenschildt told me that Oswald acted at his (De Mohrenschildt's) instructions and that he knew Oswald was going to kill Kennedy," Oltmans said. Although Oltmans had given information to the Committee shortly before, De Mohrenschildt's death had released Oltmans from his promise not to divulge certain information. Oltmans revealed that De Mohrenschildt, whom he had known for ten years, had told him that there had been a conspiracy to assassinate Kennedy and that he had played a role in the conspiracy. De Mohrenschildt said that CIA and FBI personnel were involved as well.

Oltmans played the role of De Mohrenschildt in Oliver Stone's 1991 film about the assassination, JFK.

In the Soviet Union

In the 1980s, Oltmans endeavoured to create a more balanced opinion in the West about the Soviet Union. Looking for a more poised perspective on the one sided bad image of the evil empire's communist power, he often traveled to Russia. Together with the Kremlin's foreign expert Georgi Arbatov, he wrote the book 'The Soviet position', elaborating on Moscow's perspective on the east–west issues in 1981. The book received much attention and was published in several languages.