The Yara Gambirasio case: Collection strategy and mass screening used to find the perpetrator DNA in a difficult scenario

In the winter of 2011 a corpse of a teenager was found in a fallow field after three month of environmental exposure. The autopsy showed no sign of rape but the presence of several cuts on the victim’s body. Despite exposure to weathering and animals, the clothes from the waist up were well preserved, whereas the trousers were extensively torn and the underpants were clearly cut.