The autopsy of the three dead after the shooting in a residential building near Hamburg identified and confirmed the father of the family as the perpetrator.
His two 11 and 13-year-old sons were each shot dead, as a spokesman for the Lübeck public prosecutor said on Tuesday.
The forensic medical examinations also showed that the father "obviously" shot himself.
On the late evening of Boxing Day, the bodies of the two children were found after gunshots in the residential building in Glinde in Schleswig-Holstein.
The children's father died in the house despite attempts at resuscitation.
The mother was taken to hospital, seriously injured.
The evaluation of the emergency call also showed that the 44-year-old was the one “who was responsible for the shots”.
According to the information, the wife dropped the emergency call.
She was still in an artificial coma on Tuesday with multiple gunshot wounds.
The emergency call did not give any indication of a motive.
The crime scene has not yet been released for further investigations in this matter by the forensics department.
After working for 15 hours on Monday, the criminal police technicians resumed their work on Tuesday.
They're looking for more clues in the house and they're going to secure them.
These include, for example, the projectiles, bullet holes and blood splatters.
The spokesman did not want to mention the nationality of the family with reference to the press code, according to which the nationality does not have to be mentioned if it is not relevant to the crime or is of justified public interest.
On Monday and Tuesday, several people had left flowers, candles and letters on the garden fence in front of the family's house.
There were also two white cuddly toy bears with Santa Claus hats sitting there.
In a letter about this, a child said, “We will miss you!
Rest in Peace! ”And painted an angel with wings and a halo.