Sources:

18 years after she disappeared, Natalee Holloway's family finally has answers | NPR

Joran van der Sloot Admits to Killing Natalee Holloway, Judge Says | NYT 

Man Tied to Natalee Holloway Disappearance Is Extradited to U.S. | NYT 

Suspect admits he killed Natalee Holloway on Aruba in 2005, pleads guilty to extorting her mother | AP 

Suspect in Holloway disappearance to appear in federal court for extortion case; plea deal possible | AP 

Joran van der Sloot Admits to Killing Natalee Holloway, Judge Says | NYT