"I was going to use one of my suitcases to take her out of the hotel, but I didn't do it because I was afraid someone [would] stop me carrying my luggage without paying," said Van der Sloot, who told interrogators he had not paid for his final three nights in a Lima, Peru, hotel, according to a report in the Peruvian paper La Republica citing a source who recounted Van der Sloot's alleged confession.
Before leaving the hotel room for good early on May 30 – about four hours after video surveillance caught him and Flores entering together – Van der Sloot took a shower, shaved and changed his clothes. At some point during those hours, he told police, he also took three amphetamine pills, the report says.
Flores's lifeless body was discovered three days later, on June 2, by a hotel employee. Van der Sloot was arrested the next day in Chile and later returned to Peru, where he faces a likely murder charge that could be filed this week.
Details of Extortion CaseMeanwhile, a source tells PEOPLE the FBI provided the $25,000 used to entangle Van der Sloot in an extortion attempt against the family of Natalee Holloway, whose unsolved disappearance in Aruba five years earlier has long been tied to Van der Sloot.
However, the FBI denies that the agency provided the funds for the sting operation. A joint statement from United States Attorney Joyce White Vance and FBI Special Agent Patrick Maley released Thursday says, "The funds involved were private funds."
The statement says Van der Sloot offered to provide information to an unnamed individual regarding the location of Natalee Holloway's remains in exchange for $250,000.
After Van der Sloot’s claim regarding the location of Natalee's remains proved false, the U.S. Attorney’s Office in Birmingham, Ala., filed charges against him alleging both extortion and wire fraud.
The sting – with $10,000 handed to van der Sloot on May 10, four days before he arrived in Peru, and another $15,000 wired to a bank in The Netherlands – involved John Q. Kelly, an attorney for Natalee's mother Beth Holloway, who sat down in Aruba with Van der Sloot to turn over the cash in exchange for promised details on Natalee’s death and the whereabouts of her remains, a source tells PEOPLE.
Four days after the cash exchange, Van der Sloot entered Peru, apparently to compete in a poker tournament. There, on May 30, he allegedly killed Flores in his hotel room after she encountered news about his link to the Holloway case on his laptop computer, according to media reports of his confession.
As for why Van der Sloot was not arrested before he left Aruba, the statement from the FBI says, "Despite having been in motion for several weeks at the time of Miss Flores's death, it was not sufficiently developed to bring charges prior to the time Van der Sloot left Aruba."
Peggy Sanford, a spokeswoman for the U.S. Attorney's Office in Birmingham, Ala., tells PEOPLE that authorities "will still pursue extradition," of Van der Sloot. "It is premature to speculate exactly how that may proceed in light of the case in Peru."
Legal experts, however, tell PEOPLE the Peru murder takes precedence over both the extortion case and any movement in the stalled Aruba investigation into Natalee's disappearance.
"Peru's got the body, Peru has the only right to prosecute him right now, and the U.S. and Aruba are way down the list," says high-profile criminal attorney Roy Black, who is not involved in the case.