A week after 38-year-old Neils H. told the Oldenburg state court he was “truly sorry” for what he had done, he was jailed on five counts of murder with no possibility of release in his lifetime.
It was not excluded that he will be tried for further murders if investigations reveal more evidence against him.
Detectives were looking into more than 200 deaths during the man's service in Delmenhorst, Oldenburg and Wilhelmshaven in the Bremen area in Lower Saxony.
The man admitted that between 2003 and 2005 he had administered excessive doses of medications to 90 patients, 30 of whom he said he had been unable to revive.
But he claims that he did not harm any patients outside the Delmenhorst Clinic.
“There was excitement and a sense of expectation for what would happen,” he said of his motivation to take people to the brink of death and try to haul them back again.
Successful revivals of patients whose hearts had stopped made him feel good, he added.
A special investigation team will exhume up to twelve more former patients in the coming weeks for examination for traces of the same medication.
Niels H. had already been jailed for a similar crime in 2008 and served most of a seven and a half year sentence.