(FILES) This file photo taken on April 25, 2018 shows the homemade submarine UC3 Nautilus as it is covered with green tarpaulin in Nordhavn, a harbour area in Copenhagen, Denmark. - Peter Madsen, who was sentenced to life in prison for the murder of Swedish journalist Kim Wall aboard his home-made submarine, admitted to the crime for the first time in a documentary broadcast Wednesday, September 9, 2020. (Photo by Mads Claus Rasmussen / Scanpix Denmark / AFP) / - Denmark OUT