A 19-year-old was sentenced to twelve and a half years in prison in Lüneburg for the murder of his girlfriend of the same age.
After the knife attack, the youth chamber of the regional court found him guilty under adult criminal law on Thursday.
This corresponded to the demands of the public prosecutor's office, which did not plead for life because he was still an adolescent.
The Chamber saw no base motives, but found treachery.
The motive remained unclear.
The judgment is not yet final (AZ: 31 KLs 1501 Js), an appeal can be lodged within a week.
The German had confessed to stabbing the high school graduate in her car on the evening of January 18.
The accessory prosecution saw maliciousness and low motivation in the brutal act with a kitchen knife.
Because of the gravity of the guilt, representatives of the victim's family pleaded for life.
They rated the verdict as very balanced.
The defense attorney wanted to achieve an assessment under juvenile criminal law and a moderate sentence of no more than ten years for manslaughter.
The victim's father found his daughter at night.
He had been looking for her because she hadn't come home from her job in a pub in the evening.