Van der Sloot will spend all week at criminal police headquarters in Lima being questioned in the death of a 21-year-old Lima woman and has asked to be able to hire his own lawyer in Peru, authorities said Sunday.
The Dutchman, who is also the prime suspect in Alabama teen Natalee Holloway's 2005 disappearance in Aruba, is being held in a seventh-floor cell with a bunk bed and blanket and gets three hot meals a day, said Maj. Jose Gamboa, spokesman for the Peruvian national police.
Van der Sloot is suspected in the May 30 killing - five years to the day after Holloway's disappearance - of Stephany Flores, a business student police say he met playing poker at a casino.
Van der Sloot crossed into Chile last Monday, where he was arrested three days later.
But, reports CBS News Correspondent Jeff Glor, van der Sloot's lawyer in Holland contends van der Sloot was going to surrender.
Bert de Rooij told CBS News, "Just before he got arrested he e-mailed me that he would give himself in in the police station of Santiago, Chile, just before this he was arrested."
Police released video Saturday taken by security cameras at the hotel where van der Sloot had been staying since arriving from Colombia on May 14. It shows the two entering van der Sloot's room together and the Dutchman leaving alone four hours later, carrying two bags.
The woman's battered body was found on the room's floor more than two days later. Authorities say her neck was broken.
"The only possessions of my daughter they found were her empty wallet and her cell phone," her father, circus empresario Ricardo Flores, said in TV interview Sunday night. "There wasn't a peso in her wallet."
Van der Sloot remains the prime suspect in the disappearance in Aruba of Holloway, an Alabama teen who hasn't been seen since May 30, 2005. He was twice taken into custody and released in that case, but never charged.
Van der Sloot was charged Thursday in the United States with trying to extort $250,000 from Holloway's family in exchange for disclosing the location of her body and describing how she died.
U.S. prosecutors say $15,000 was transferred to a Dutch bank account in his name. In the Netherlands on Friday, prosecutors raided two homes in the case, seizing computers, cell phones and data-storage devices.
In video taken of the husky 22-year-old Dutchman that was broadcast Sunday by a TV channel, Peruvian police search van der Sloot's possessions in his presence.
They pull out of his backpack a laptop, a business-card holder and 15 bills in foreign currency. Van der Sloot tells police the money includes Thai, Cambodian and Bolivian currency. He is asked for credit cards and documents and appears to say - his Spanish is very rudimentary - that they are in a hotel room back in Chile.