Aruban authorities have seen the tape obtained by ABC News and have used it in their investigation into Holloway's disappearance. Beth Twitty, Holloway's mother, has also seen the tape. She told ABC News she had viewed it on the first night she arrived in Aruba to search for her daughter but had seen only the portion that appeared to show van der Sloot.
Soon after admittedly lying to police about having dropped Holloway off at her hotel, van der Sloot became the main suspect in the case.
Van der Sloot -- along with Deepak Kalpoe and Satish Kalpoe -- was arrested June 9 on suspicion of involvement in Holloway's disappearance. Van der Sloot admitted that he was with her but denied any wrongdoing. All were released after a court ruled that there wasn't enough evidence to hold them. Van der Sloot said he didn't want to tell the truth because he was scared.
"I didn't want anyone to know," he said. "I didn't want anyone to know I left her at the beach."
He said he is a "normal teenager," adding, "I like playing sports. I go to college. I hang out with friends."
At the same time, he told "Primetime" that his version of events is hard to believe. When asked why, after all the lying he's done, his word should be credible, he said, "There's absolutely no reason to believe me."
"I would probably not believe myself, no," he added.
Yet, he said, it was important that he tell his story.
"Because it's the truth," he said. "It's time to just tell the truth."