File: Investigators believe Peter Madsen "deliberately" sank the vessel shortly before he was rescued.
COPENHAGEN, Denmark - Danish inventor Peter Madsen on Thursday denied murdering Swedish journalist Kim Wall aboard his homemade submarine last year as his highly-anticipated trial opened in Copenhagen.
Madsen, who had previously admitted dismembering Wall&39;s body and throwing her remains overboard, did not address the court but his lawyer Betina Hald Engmark said that he denied the murder charge and maintained his position that Wall died accidentally on board his submarine.
Here are the main events in the gruesome case that has captivated the world:
Kim Wall, a plucky 30-year-old freelance reporter criss-crossing the globe for unique, quirky stories, boards self-taught engineer Peter Madsen&39;s homemade submarine, the UC3 Nautilus, in a Copenhagen harbour on August 10, 2017, to interview him for a story.
But she never returns. Wall&39;s boyfriend, with whom she had planned to move to China, reports her as missing on August 11.
The Nautilus is found that same day, sinking, as Madsen, 47, is rescued from the water.
The eccentric and well-known figure in Denmark tells authorities he dropped Wall off in the harbour the night before and that a technical problem caused the vessel to sink.
But the Danish authorities are not convinced. Madsen is detained for negligent manslaughter under particularly aggravating circumstances on August 12.
Investigators believe the 60-foot (18-metre) vessel was deliberately sunk.
&39;Buried at sea&39;
Madsen changes his story on August 21 and says Wall died in an accident onboard his vessel. Having panicked and contemplated suicide, he subsequently "buried her at sea in an undefined location of the Koge Bay" south of Copenhagen.
Two days later, Copenhagen police confirm that a headless torso found in Koge Bay is Wall&39;s. The head and limbs had been deliberately cut off. The torso had been attached to a metal object to weigh it down.
Madsen is charged with indecent handling of a corpse during a police hearing on August 24. He insists she died in an accident when a hatch hit her on the head while onboard the vessel.
On October 3, investigators say they have found a hard disk in Madsen&39;s workshop that contained fetish films in which women were tortured, decapitated and burned alive. Madsen claims the hard drive is not his.
Prosecutors also reveal autopsy results which show Wall was stabbed 14 times in her genital area and once in the chest before her death.
After an extensive search in Danish waters, Copenhagen police announce on October 7 they have found Wall&39;s head, legs, a sweater and a knife in Koge Bay.
Forensic results show no sign of a fracture on her skull.
&39;Brought a saw&39;
Danish divers find both of Wall&39;s arms on November 21 and 29, respectively, near the same area where her other body parts were discovered.
A January 24 charge sheet says Madsen tied Wall up by the head, arms and legs before beating, "stabbing and cutting her".
An eccentric "inventrepreneur", or a murdering, sexual sadist? The evidence against Peter Madsen has provided some clues about how Swedish journalist Kim Wall died on board his homemade submarine, but he has yet to tell the whole story https://t.co/zV5DQW5snd pic.twitter.com/4Z5OaD35Nj— AFP news agency (@AFP) March 8, 2018
Prosecutors say Madsen, who faces a life sentence if found guilty, "brought a saw, knife, sharpened screwdriver, straps, strips and pipes" on board the vessel with the intention of killing Wall.
Neither the cause of death nor the motive has been established, but investigators believe Wall was strangled or had her throat cut as part of a sadistic sex crime.
Madsen has changed his story several times about how he claims Wall died.