prosecutor jakob buch - jepsen said .
the court heard he had been working on building cause of journalist ’s death yet to be established , court hears , as murder suspect peter madsen ’s custody is extended the suspected killer of swedish journalist kim wall will be detained for four more weeks after a copenhagen court heard that 15 stab wounds had been found on her body .
no investigations had been carried out to substantiate madsen ’s vestre prison .
an examination of madsen ’s computer had also uncovered material featuring women being tortured and killed .
peter madsen , 46 , faces a murder charge over the death of the 30 - year - old journalist , whose headless , dismembered torso was found floating off denmark ’s capital city 10 days after she boarded the inventor ’s self - built submarine for an interview .
scanpix denmark ida marie odgaard via reuters a danish inventor charged with murdering swedish journalist kim wall in his home - made submarine had video footage on his computer showing women being violently killed , a court heard on tuesday .
dna tests from madsen , the prosecutor , jakob buch - jepsen said , though the exact cause of death remained unknown .
his defence lawyer , betina hald engmark , said the court had heard “ nothing that supports kim wall being killed by my client ” .