Danish prosecutors said he may have killed Swedish journalist Kim Wall on board his homebuilt submarine by cutting her throat or by strangulation.
Danish prosecutors will seek to have inventor Peter Madsen jailed for life, after he was charged with murdering Swedish journalist Kim Wall during a trip on his private submarine.
Prosecutor Jakob Buch-Jepsen said that the case is "very unusual and extremely gross." He added that Madsen killed the 30 year old freelance journalist by cutting her throat or strangulation.
Madsen was also charged with indecent handling of a corpse , after Wall's body parts were found in the sea near Copenhagen, along with a charge of sexual assault without intercourse of a particularly dangerous nature.
Wall, who was researching a story on the entrepreneur and aerospace engineer, went missing after he took her out to sea in his 17-metre (56-foot) submarine last August.
Madsen claims she died accidentally inside the submarine while he was on deck during the excursion.
However, he admits throwing her body parts into the sea.
The start of the trial has been set for March 8. A verdict is expected April 25.