In this June 8, 2010, file photo, Beth Holloway, mother of Natalee Holloway, speaks during the opening of the Natalee Holloway Resource Center (NHRC) at the National Museum of Crime & Punishment in Washington. Beth Holloway said on NBC's "Today" show Monday, August, 29, 2016, that justice hasn't been served in her daughter's death. (Photo: AP/Pablo Martinez Monsivais, File)

The father of Natalee Holloway, the American teenager who disappeared in Aruba 12 years ago, revealed that he and a private investigator recently discovered human remains behind a house on the island. 

Dave Holloway and investigator T.J. Ward told Today that during the course of an 18-month investigation they were led to remains which are being DNA tested to determine if they belong to his daughter.  

"When we determined these remains were human, I was shocked,'' Holloway told Matt Lauer and Savannah Guthrie on the program Wednesday. "I know there's a possibility this could be someone else, and I'm just trying to wait and see."

Natalee disappeared in 2005 while on a post-graduation trip with friends. The 18-year-old was last seen outside a bar with Joran van der Sloot, who was raised in Aruba.

Van der Sloot has never been charged in Natalee's disappearance and is currently serving time for killing Peruvian student Stephany Flores

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