On Wednesday, the Potsdam district court sentenced the former nurse Ines Andrea R. to 15 years in prison for fourfold murders and threefold attempted murders.
According to the court order, she will be admitted to a psychiatric clinic.
On April 28, R. had killed two women and two men between the ages of 31 and 56 in a dormitory for the disabled.
She had first tried to strangle two of them.
Then she got a knife, killed both of them and two other people with disabilities who lived in the dormitory of the Oberlinhaus in Potsdam.
A 43-year-old resident who she also tried to kill survived thanks to emergency surgery.
Markus Wehner
Political correspondent in Berlin.
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The court found that the defendant's impulse control and affect control were severely impaired by a borderline disorder. This was followed by a psychiatric report that found a reduced guilty capacity. Instead of a life sentence, the maximum sentence of 15 years was imposed.
At the trial, the defendant told of her difficult life, which was marked by suicide attempts and depression.
One of her two sons is severely disabled, the other fell ill with a brain tumor.
Although she was considered a friendly and loving nurse, the woman had long felt an inner rage and had fantasies about killing.
In the days before the act, she was at the end of her strength, said the presiding judge.
The anger has degenerated into violence against people.
"If you had gone to the doctor, the victims would not have died in such a cruel way," said the judge to the defendant, who had regretted what she had done during the trial