|Born|| ca. 1936|
|Cause of death||Suicide|
|Date|| September 23, 1969|
|Location(s)||Ahlen, West Germany|
Leifeld sufferd from chronic icterus and on the day of the murders was scheduled to return to hospital for stationary treatment, much to her distress. Apparently she also feared that she suffered from lung cancer, but according to her physician these fears were unsubstantiated.
Around 4:30 a.m. Leifeld killed her 63-year-old mother, her 35-year-old husband, and her four children, aged between 7 months and 8 years, while they were sleeping in their beds. All of them were shot in the head, or chest with a 6.35-caliber pistol with a six-round magazine. According to police the 33-year-old supposedly had drugged her victims with pills prior to the murders, and also swallowed them herself.
Before committing suicide she left a note in a notebook, writing:
"I have to go back to hospital, that's why I had to do this. It happend at half past four. I hope that nobody survives. We don't have any debts."
The last couple of words in her notebook were indistinct, probably because she was already under the influence of the medication. The bodies were discovered the same evening by her brother-in-law, who came to investigate, after her husband had not shown up for work.