The teen's mother, Beth Holloway, said she's satisfied with that confession.

Van der Sloot's confession was backed up by his polygraph test, according to the mother.

Van der Sloot's term is to run concurrently with his time in Peru, where he's serving time for the murder 21-year-old college student Stephany Flores.

“I have what I need," Holloway said. "Her case is solved.”

After Manasco declared his guilt, van der Sloot told the court he's embraced Christianity and said he's a different person than he was nearly two decades ago.

"You are a killer and I want you to remember that every time that jail cell door slams," Holloway said from the courtroom lectern.

Court documents describing van der Sloot’s actions that night did not include what he did after the crime.

"Nothing can change that, but I hope these proceedings help them feel like they've received a measure of justice for her murder."