Question: The author of the book De zaak Natalee Holloway was convicted of whose murder in 2010?

Context paragraphs:
De zaak Natalee Holloway: De zaak Natalee Holloway: mijn eigen verhaal over haar verdwijning op Aruba (English: "The Case of Natalee Holloway: My own story about her disappearance in Aruba") is an autobiographical non-fiction book written by Joran van der Sloot with Zvezdana Vukojevic.  It was released in 2007 in the Dutch language by Amsterdam-based publisher Sijthoff.  An English version was not published.

Natalee Holloway (film): Natalee Holloway is a 2009 American television film directed by Mikael Salomon based on Beth Holloway's book about the 2005 disappearance of her daughter Natalee Holloway.  The film stars Amy Gumenick as Natalee Holloway, Tracy Pollan as Beth Holloway-Twitty and Jacques Strydom as Joran van der Sloot.  When it aired on the Lifetime Movie Network on April 19, 2009, the film scored the highest television ratings at that time in the network's history.

John Q. Kelly: John Quinlan Kelly (born July 31, 1953) is a New York City attorney specializing in high-profile wrongful death cases, and whose clients (includes the family of Nicole Brown Simpson and Natalee Holloway) are at the center of some of the biggest news stories in history.

Patrick van der Eem: Patrick Paul van der Eem (born 1973; Curaçao) is a Dutch Antillean entrepreneur and convicted drug dealer known for his part in the undercover television report about Joran van der Sloot that was produced by Dutch crime reporter Peter R. de Vries.  The program set a Dutch television viewing record and renewed attention in the ongoing investigation of the 2005 disappearance of American student Natalee Holloway in Aruba.

Hilde De Baerdemaeker: Hilde de Baerdemaeker (born 8 May 1978) is a Flemish actress.  She is best known for her roles as Louise in "Louislouise", and as Linda De Leenheer in "De Zaak Alzheimer" (in English: "The Memory of a Killer" or "The Alzheimer Case"), "Team Spirit", and "Halleluja".

Aruba: The Tragic Untold Story of Natalee Holloway and Corruption in Paradise: Aruba: The Tragic Untold Story of Natalee Holloway and Corruption in Paradise

Dossier K.: Dossier K. is a Flemish thriller film directed by Jan Verheyen, based on a novel by Jef Geeraerts.  "Dossier K." is the second book by Jef Geeraerts for the series about detectives Vincke and Verstuyft that has been put to screen after De zaak Alzheimer.  Several actors from the first film reprise their roles, including Koen De Bouw, Werner De Smedt, Hilde De Baerdemaeker, Filip Peters and Jappe Claes.  It is a film about crimes in the Albanian mafia scene in Antwerp.

Loving Natalee: Loving Natalee: A Mother's Testament of Hope and Faith is an autobiography written by Beth Holloway about her missing daughter Natalee Holloway, with portions contributed by Sunny Tillman.  It was first published in October 2007 by HarperOne, an imprint of HarperCollins, and has also been marketed under its alternate subtitle "The True Story of the Aruba Kidnapping and Its Aftermath".

Joran van der Sloot: Joran Andreas Petrus van der Sloot (] ; born 6 August 1987) is a Dutch convicted murderer who killed Stephany Flores Ramírez in Lima, Peru in 2010.  He is also the prime suspect in the 2005 disappearance of Natalee Holloway in Aruba.

The Alzheimer Case: The Alzheimer Case, also known as "The Alzheimer Affair" or "The Memory of a Killer", Dutch: "De Zaak Alzheimer" , is a 2003 film directed by Erik Van Looy, based on the novel "De Zaak Alzheimer" by Jef Geeraerts.  An American remake of the film is in development at Focus Features.  Stephane Sperry is the producer.  Matthew Michaud adapted the screenplay from the original film.

Supporting paragraphs: De zaak Natalee Holloway Joran van der Sloot
Answer: Stephany Flores Ramírez