Copenhagen prosecutor Jakob Buch-Jepsen announced in a court hearing Wednesday that "images" of the torture, decapitation, and burning of a woman were found on a computer hard drive at RML Spacelab, the organization devoted to building a manned suborbital rocket led by Danish aerospace engineer Peter Madsen. The BBC reports that the images, "which we presume to be real," said Buch-Jepsen, were on a computer believed to belong to Madsen—the suspect in the death of journalist Kim Wall in an incident aboard his submarine the UC3 Nautilus.

Madsen, for his part, claimed the video was not his and that the computer the video was on was a computer that everyone in the lab had access to. But other evidence presented in this latest hearing on his case has prompted the judge overseeing the case to order he be held in custody another four months, as Buch-Jepsen told the court of the video and other evidence that have "strengthened" the case against Madsen since his last hearing on September 5.

Wall's headless, limbless torso was found on the shore on August 21, ten days after Madsen deliberately sank his sub in shallow waters near Copenhagen. The body was identified by DNA, and traces of Wall's blood were found within the submarine after it was raised. Autopsy results found that Wall had been stabbed in her ribcage and genitals, either at the time of her death or shortly afterward, though no cause of death was determined.

Madsen initially claimed that he had dropped Wall off the night before but then admitted she had died aboard the sub. He claimed that a 154-pound (70 kg) hatch had slipped from his fingers and hit her on the head, shattering her skull—and that he then buried her at sea and planned to commit suicide by sinking the sub. Hours later, he was seen aboard the sub approaching the harbor, when the submarine sank. He swam to safety and was rescued by a nearby boat.

Madsen, who led the project to build the Nautilus (and a crowdsourced funding campaign to refurbish it), as well as two previous submarines while associated with the open source space flight project Copenhagen Suborbitals, took custody of the sub after an acrimonious breakup with the organization and the formation of RML, named for his nickname, "Rocket Madsen."