Chilling final photo of missing journalist Kim Wall on submarine before vanishing

The haunting last known photographs of Swedish journalist Kim Wall have emerged showing her standing on a submarine's tower where she is believed to have died.

Known as "Rocket" and the "crazy professor", Peter Madsen is accused of killing the 30-year-old after the duo set sail from the port of Copenhagen, Denmark, in his home-made submarine, the UC3 Nautilus last Thursday.

The 46-year-old inventor was charged with the involuntary manslaughter of Wall over the weekend.

He has denied the allegations.

This is the last known photo of journalist Kim Wall. Source: AFP
This is the last known photo of journalist Kim Wall. Source: AFP

The freelance journalist reportedly told her boyfriend she was doing a story for Wired Magazine on the inventor and his homemade submarine.

Her boyfriend reported her missing on Friday morning after she failed to return home.

It was later revealed the vessel sank in a bay off Copenhagen.

The submarine was refloated and towed to the Copenhagen port on Saturday, then emptied of water overnight.

Kim Wall disappeared after she went for a ride in the submarine. Source: Twitter
Kim Wall disappeared after she went for a ride in the submarine. Source: Twitter

On Sunday police entered the sub and found it empty.

Madsen claims he dropped her off on the Refshaleoen island on Thursday evening after the interview.

The last known photos of Wall show her standing in the vessel's tower before setting sail.

Police now believe the vessel was deliberately sunk.

Investigators searched the vessel over the weekend but didn't find a body. Source: AFP
Investigators searched the vessel over the weekend but didn't find a body. Source: AFP

"It appears as though it was a deliberate action that caused the sub to sink," Copenhagen police homicide chief Jens Moller told reporters.

"The sub has been searched and there is nobody on board - neither dead nor alive.

"We're still hoping that we'll find Kim Wall alive, but we are preparing ourselves for the fact that she may not be."

Wall is a freelance journalist based in China and the US. Her articles have appeared in the New York Times and the Guardian, among others.

Peter “Rocket” Madsen with the Nautilus at its 2008 launch. Source: AP
Peter “Rocket” Madsen with the Nautilus at its 2008 launch. Source: AP

Madsen made headlines when he launched the 18-metre Nautilus in 2008, at the time the world's biggest homemade submarine.

Wall’s family and friends have made heartbreaking appeals for information over social media for more information.

“It is with great dismay that we received the news that Kim went missing during an assignment in Denmark,” her family said in a statement.