On this day - 28 August

Niels Högel was a nurse working in hospitals in Germany. He was convicted of three counts of murder and two of attempted murder in 2014 and sentenced to life in prison in 2015. During the trial, Högel confessed involvement in another 30 murders and police launched an investigation.

The investigation took three years and involved examinations of more than 200 deaths of patients that were deemed suspicious where Högel had worked. On August 28th 2017 police announced that Högel was responsible for at least 90 of his patient's deaths using medications to trigger arrhythmias or drop blood pressure. Estimates of his death count have continued to rise and make him one of the most prolific serial killers in both Germany and worldwide.