Ex porn star reveals inventor accused of murdering Swedish journalist on his submarine had invited her on board his vessel two weeks earlier but she had 'a bad feeling about it'

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A retired porn star has revealed how an inventor accused of murdering a Swedish journalist on his submarine had invited her on board the vessel two weeks earlier but she had 'a bad feeling about it'.

Dorthe Damsgaard said she had declined invitations to join Peter Madsen on his sub having met him several times and that he 'made it no secret to me about having sexual fantasies'.

Businessman Madsen stands trial at Copenhagen's City Court on Thursday for the killing of Kim Wall, 30, in his submarine off the northern European country.

He denies killing Wall and says she died accidentally inside the UC3 Nautilus while he was on deck. However, he has admitted cutting her up before he 'buried her at sea.'

Retired adult movie actress Damsgaard, 48, said Madsen had 'two sides', adding: 'He could be a well-spoken and charismatic person who could speak for hours about his submarine. And then ... a much darker side.

Retired porn star Dorthe Damsgaard (pictured) has revealed how an inventor accused of murdering a Swedish journalist on his submarine had invited her on board the vessel two weeks earlier but she had 'a bad feeling about it'

Trial: Peter Madsen is accused of the murder of Swedish journalist Kim Wall in August last year, and has admitted to mutilating her body and 'burying her at sea'

Dorthe Damsgaard said she had declined invitations to join Peter Madsen having met him several times and that he 'made it no secret to me about having sexual fantasies'

Retired adult movie actress Dorthe Damsgaard (pictured), 48, said Peter Madsen had 'two sides'

She told The Associated Press she had declined invitations to join Madsen in his submarine because she has claustrophobia.

'He made it no secret to me about having sexual fantasies,' Damsgaard said, describing him as 'funny, manipulative, serious and scary.'

In another interview with the Danish newspaper BT, she revealed that the last time he invited her on board was 14 days before he left shore with the journalist.

She said she was first contacted by him nine years ago, adding: 'He called me one day and said he would like to get to know me.

'I thought it might be good for me to be surrounded by a knowledgeable person like him. 

On one occasion of being asked on board, she said she refused because she had a, 'bad feeling about it'. 

It comes as footage emerged showing what is believed to be the final video shot inside the submarine before the inventor allegedly murdered Wall.

Michael Youget, 36, a technology and submarine enthusiast from Norway, had contacted Madsen, 47, about his project and had asked if he could visit the project in Copenhagen, Denmark.

As well as getting a grand tour of the submarine Nautilus, Youget was invited to stay the night in the vessel, just three days before it set sail with Madsen and Miss Wall in August last year.

In July 2017, Mr Youget contacted Madsen on Facebook to ask if he was the man who had built his own submarine and if he could come and help out with the project in anyway.

Madsen invited him to come down to Copenhagen, and on August 7, Mr Youget arrived at the ship yard where Madsen's crew worked.

His former workshop, a low building of corrugated iron, sits on Refshale island, a once-bustling shipyard and industrial area across from downtown Copenhagen.

Speaking to Norwegian media, Mr Youget says he was quite disappointed when got there as he had expected 'advanced technology' but only found a workshop in a low building of rusty corrugated iron.

'I had already had a strange feeling when I shook his hand,' he tells Verdens Gang.

Michael Youget, 36, from Norway, visited inventor Peter Madsen's submarine in Copenhagen, Denmark just days before he is alleged to have murdered Kim Wall

'But that was more about the place than him. It was a kind of 'I don't want to be here'- feeling that I still struggle to explain today.

'I don't know what gave me that feeling. It's that kind of feeling you only get a few times.'

At the end of the day, after a tour of the workshop and the submarine, Youget told Madsen that he would head back into central Copenhagen to find a hostel, at which point Madsen insisted he stay the night in Nautilus. 

'He said I just have to sleep in the submarine. No one else was going to sleep there, so it suited him well'.

He filmed the video, published on Aftonbladet, which shows the sleeping compartments and the different areas of the home-made submarine. 

The following day Mr Youget had been due to take part in a test launch of one of Madsen's home-made rockets, but after this had been postponed, he ended up returning home to Norway where he leader about the shocking events a few days later. 

Madsen is due to stand trial at Copenhagen's City Court on Thursday for the killing of Miss Wall.

After spending the day with Madsen and his team, Youget says Madden insisted he spend the night on Nautilus

'Strange: Mr Youget says the Danish inventor, who is due to stand trial tomorrow, gave him   a strange feeling

Madsen denies killing Wall and says she died accidentally inside the UC3 Nautilus while he was on deck. However, he has admitted cutting her up before he 'buried her at sea.'

Some don't want to talk about Madsen or be associated with him anymore. Others do. 

Madsen's wife, who reportedly has sought a divorce, has told investigators that he openly spoke about attending fetish parties without her. 

On August 10, Miss Wall and her Danish boyfriend, Ole Stobbe Nielsen, threw a goodbye party before moving to China. 

That evening, she received a text message from Madsen saying an interview was possible. For months, she had been trying to speak with him and she left the party to join the now 47-year-old Dane.

After Wall left to meet Madsen, her boyfriend received several text messages from her. 

He started worrying when the messages stopped coming and eventually alerted authorities, who launched a search for the submarine, which didn't have a satellite tracking system.

This is one of the last images of Kim Wall, as she and Madsen prepared to set off from Copenhagen harbour aboard Nautilus on August 11, 2017

The 33-ton, nearly 18-meter-long submarine sank south of Copenhagen shortly after being spotted afloat. Madsen was picked up unharmed. Initially, he told police he had let Wall off on Refshale island several hours into the trip.

Investigators found dried blood inside the submarine, and divers eventually found Wall's body parts in plastic bags held down on the Baltic Sea bed by metal pieces. Her torso had been stabbed multiple times.

Police believe Madsen sank the submarine on purpose, and found videos of women being tortured and killed on his personal computer in his hangar. He did not make the videos himself, investigators said.

Prosecutor Jakob Buch-Jepsen claims Madsen tied up and tortured Walls before killing her, either by cutting her throat or strangling her. The murder has been called premeditated because he had brought along tools he normally wouldn't take with him on the submarine.

Madsen has undergone a court-ordered psychiatric evaluation and is deemed fit for trial. His defense lawyer, Betina Hald Engmark, won't discuss the case before the trial begins.

Kim Wall grew up in southern Sweden, just across a narrow waterway from Copenhagen. She studied at Paris' Sorbonne university, the London School of Economics and Columbia University in New York, from where she graduated with a master's degree in journalism in 2013.

She wrote for The New York Times, The Guardian and other publications, reporting on topics such as tourism in post-earthquake Haiti and nuclear testing in the Marshall Islands. 

Wall's family has declined to comment 'for the time being.'