Police said on Tuesday that they had no idea how anyone could have got into the funeral home in the small southern German town of Wangen, as it was locked all night and there was no sign of a break in, the regional Schwäbische Zeitung paper reported.
Police are treating the crime as the violation of a grave – punishable by up to three years in prison – but forensic scientists are examining the body for signs of necrophilia.
The 90-year-old woman had been moved to another room of the funeral home and partially undressed - a discovery that has left her family “shocked and distraught,” police spokesman Peter Korn told the paper.
To his knowledge, the incident is the first of its kind for his division, and he added that more details had not been released out of consideration of the woman's family.
He did say that in-depth examinations of the mortuary and the corpse were under way though.
They believe that the incident took place between Saturday afternoon and early Sunday morning and are appealing for anyone with information to come forward.