COPENHAGEN — The Copenhagen police announced on Wednesday that a torso found this week in local waters was that of Kim Wall, a Swedish journalist whose disappearance after boarding a Danish inventor’s submarine became a grim mystery that has stunned many Scandinavians.
The inventor, Peter Madsen, is being held on preliminary charges of involuntary manslaughter in connection with the death of Ms. Wall, 30. The journalist had been missing since Aug. 10; Mr. Madsen initially told the authorities that the two had gone out on his self-designed submarine for an article Ms. Wall was working on, and that he had dropped her off later that night in a remote section of the port of Copenhagen.
But he later told investigators that an accident on the submarine, which sank, had caused Ms. Wall’s death, and that he had buried her at sea.
On Monday, a woman’s torso was found on the edge of Amager Island, near where Mr. Madsen’s submarine was found to have sunk. On Wednesday, the police said on Twitter that DNA testing had confirmed that the torso was Ms. Wall’s.
Jens Moller, chief homicide investigator for the Copenhagen police, said at a news conference that metal had been attached to the torso to weigh it down. “We consider this a breakthrough in the investigation, but we continue to search for the missing body parts,” Mr. Moller said.
He also said that “coagulated blood” had been found inside Mr. Madsen’s submarine, which was recovered from a depth of about 22 feet. The police have said that they believe the submarine was deliberately sunk.
Mr. Madsen’s lawyer, Betina Hald Engmark, said after the police announcement that she and her client “only find it positive that there is a final clarification” about Ms. Wall’s body having been found.
Much remains to be discovered, however, not least how Ms. Wall died. Mr. Moller said a cause of death had not been determined.
Ms. Wall’s family have said that she was on a freelance reporting trip in Denmark, and Mr. Madsen, a well-known maverick inventor, told the police that she was working for Wired Magazine. But a representative of that organization said she did not have an assignment from them.
“It is with boundless sadness and shock that we received news that the remains of our daughter and sister Kim Wall have been found,” Ms. Wall’s mother, Ingrid Wall, wrote on Facebook on her family’s behalf on Wednesday. “We cannot yet grasp the extent of this catastrophe and there are many questions that must be answered.”
The case has been widely discussed in Denmark, where murders are uncommon. Christian Jensen, editor in chief of Politiken, Denmark’s largest daily, called it “the most spectacular murder case in Danish history.”