The Hunt for a Killer - Season 1 Episode 6 -

15 years have passed since Helen disappeared. Pelle decides to tear down the cottage Ulf Olsson lived in when he disappeared. It is newly renovated but when they break up the floorboards they find traces of blood. But further technical evidence is needed for the prosecutor to prosecute. Pelle goes back to Ulf's apartment to see if they may have missed something. There he finds a SIM card.