(CNN) -- Here are the latest developments on the arrest of Joran van der Sloot, who is in Peruvian custody as the suspect in the killing of Stephany Flores Ramirez.
Van der Sloot could be formally charged with murder as early as Wednesday.
He is also expected to re-enact crime at the Hotel Tack in Lima. That re-enactment, initially scheduled for Tuesday, was postponed for security reasons.
Joran van der Sloot faces criminal charges in Alabama because he tried to extort $250,000 from Natalee Holloway's mother, according to an Interpol document.
Stephany Flores was killed after she discovered information on van der Sloot's laptop linking him to the disappearance of Natalee Holloway, a source with direct knowledge of the investigation told CNN.
He confessed to the Flores killing Monday night, officials said.
The Dutch citizen told investigators that he left the hotel room to buy bread and coffee at a gas station next to the hotel and returned to find Flores on his laptop.
Flores wanted to leave, and the pair started arguing. Flores slapped van der Sloot, and he hit her back and then went for her neck, a source with direct knowledge of the investigation told CNN.
Van der Sloot told investigators he was intoxicated on marijuana during the incident.
There was no evidence that Flores had sexual intercourse the night she was killed, the source said.
Van der Sloot was arrested twice in connection with Natalee Holloway's disappearance in Aruba but was released for lack of evidence. He has denied any involvement and has not been charged.
He was arrested in Chile on Thursday and returned to Peru on Friday.
Van der Sloot could get up to 35 years in prison. There is no death penalty or life sentence in Peru.