A Danish inventor has admitted to chopping up the body of a Swedish journalist who disappeared from his submarine, but insists he did not kill her.
However, officers said that Madsen now claimed Ms Wall died as a result of carbon monoxide poisoning inside the submarine when he was on deck.
The journalist vanished on 10 August after she boarded Maden’s submarine in Copenhagen to research a feature she was writing about him.
The next day, Madsen was rescued from the sinking submarine without her. Police believe he deliberately sank the vessel.
Ms Wall’s torso washed up on the Danish coast on 21 August, while investigators found bags containing her head, legs and clothing in weighted bags on 6 October.
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Madsen initially claimed that Ms Wall died after accidentally hitting her on the submarine’s hatch when he lost his footing and dropped it on her.
However, no fractures were found on Ms Wall’s skull in a post-mortem examination.
Stab wounds around the freelance journalist’s ribs and genitals were found, which investigators believe were inflicted “around or shortly after her death”.
Police said footage of women being tortured, strangled and beheaded had been found on a computer belonging to Madsen.
However, he denied the videos were his, claiming the computer was used by members of his staff.
Madsen’s lawyer, Betina Hald Engmark, said her client has not admitted any wrongdoing.