from the perspective of Cor van Hout based on interviews De Vries conducted with Van Hout and Holleeder over a period of four weeks during his last hotel arrest in Évry, Essonne in 1986. The novel was later adapted as (2015) starring Anthony Hopkins as Freddy Heineken. In 1994, De Vries tracked down Frans Meijer, one of the kidnappers, in Paraguay. Police corruption investigation On 13 September 2006, De Vries was arrested in Oisterwijk and detained for several hours in Tilburg when he tried to confront a police officer with allegations about questionable actions concerning the inheritances of elderly women. He was charged with one count of trespassing. The case was dropped in January 2007 "in view of the final results of the persistent search for the truth and the results of the disciplinary inquest" into the behavior of the police officer in question. Kennedy investigation In the first half of 2006, De Vries and Wim Dankbaar produced a two and a half hour special about the 1963 assassination of U.S. president John F. Kennedy. In what has been De Vries' longest show to date, he spent two weeks in Texas speaking with former CIA and FBI agents and the ex-girlfriend of Lee Harvey Oswald. One of the interview subjects, James Files, said he was the gunman responsible for taking Kennedy's life. Files contradicted the findings of the Warren Commission and claimed that the CIA and the mafia were involved in the assassination. Natalee Holloway disappearance In November 2006, a program by De Vries was broadcast in which he accused Joran van der Sloot, one of the prime suspects in the disappearance of Natalee Holloway in Aruba. On 11 January 2008, Van der Sloot threw a glass of red wine into De Vries' face right after a live broadcast of the Dutch talk show on which De Vries and Van der Sloot (with his parents) had been guests. The wine got into De Vries' eyes and briefly it seemed to have caused him a considerable amount of pain. During the tense but peaceful conversation during the broadcast, De Vries had on several accounts challenged Van der Sloot's integrity. On 31 January 2008, De Vries said to the media that he knew what had happened in the case of Natalee Holloway. He shared his findings with the police, stating that he would publicly show this new-found evidence in a special episode