A German former hospital nurse who has confessed to killing more than 100 patients in his care apologized on Thursday to victim relatives. “If I knew a way that would help you, I would take it, believe me,” Niels Hoegel, 41, said at his trial, according to news man. “I am fully persuaded now that I owe every relative an explanation,” said the bearded, heavyset defendant “I am honestly sad.” Hoegel, Germany’s worst post-war serial killer, has already spent nearly 10 years in jail on a life term for six other patient deaths yet has now admitted to 100 more killings. He admitted to giving patients tranquilize overdoses because he enjoyed the thrill of trying to reanimate them at last moment. Prosecutors say he was motivated by vanity, to flaunt his abilities at sparing human lives, and by simple “boredom”. At the beginning of the trial a month ago in the northern city of Oldenburg, presiding judge Sebastian Buehrmann said the fundamental point was to build up the full scope of the murder spree that was allowed to go unchecked for years at two German hospitals. Prosecutors say at least 36 patients were murdered at a doctor’s hospital in Oldenburg where he worked, and around 64 more at a center in nearby Delmenhorst, between in the range of 2000 and 2005. More than 130 bodies of patients who died on Hoegel’s watch have been exhumed, for a case agents have called “unprecedented in Germany to our knowledge”.