The 36-year-old male driver's 33-year-old wife was killed when the stone was thrown from a motorway overpass on Sunday morning. Their five year-old son escaped serious injury.
Police said that an autopsy of the female victim proved without a doubt that she was killed directly by the heavy tile.
“We can now say with certainty that the cement block cost the woman her life but beyond that we do not want to get in to the details of the autopsy results,” Commissioner Michael Lichtenstein said in a press release.
The 36-year-old German man is still in an artificially-induced coma at Odense University Hospital.
Lichtenstein said police have been contacted by several hundred members of the local community following the deadly incident, which police are treating as a murder and attempted murder.
“We are working intensively to sort through the enquiries from the public. But we are still missing information on where the stones that were thrown from the overpass came from,” Lichtenstein said.
He added that many private citizens and local businesses have offered to put up a reward for any information that would lead to an arrest.
“The enquiries about a reward go to show how much this case has affected the public,” he said.
Funen Police said early this week that Sunday's fatal incident was at least the third time over the course of the weekend that heavy stones were thrown on moving cars from the same overpass.