the 46—year—old denies killing a swedishjournalist who had been travelling with him. 30—year—old kim vally aeberhard reports. kim wall and peter madsen, looking out from the home—built nautilus on thursday evening, as it leaves copenhagen. ms wall, apparently seen here, was the only passenger. that much is clear. what happened next is not. the freelance journalist's boyfriend reported her missing, and a huge search was launched. mr madsen was spotted by witnesses on friday, aboard the nautilus. but soon after, it sank — fast. it was located at a depth of seven metres, and efforts to recover it are underway. peter, are you ok? are you ok? mr madsen was rescued, reportedly as the sub went down, by a private boat. he said he was fine, although a little sad, seeing the nautilus go down. peter madsen had hit the headlines in 2008, when he managed to build the nearly—80—metre—long vessel using online crowdfunding. he was arrested when he returned to shore. the inventor says he dropped ms wall off on one of copenhagen‘s islands on thursday night. police are examining cctv footage to try to verif