The 24-year-old Dutch national confessed to the charges of “qualified murder” and simple robbery in Ms. Flores’ death.
Investigators said they believed Mr. van der Sloot killed the Peruvian woman in his Lima hotel room after she found something related to the Holloway case on his computer.
Mr. Van der Sloot was among the last people seen with Ms. Holloway in Aruba. He was detained twice, but never charged, in the Alabama teenager’s disappearance. Her body has never been found, but an Alabama judge signed an order Thursday declaring her dead.