A former nurse has admitted to killing 100 patients in his care, on the first day of his trial in the biggest serial killing case in Germany’s post-war history. Niels Hoegel, 41, has already spent nearly a decade in prison on a life term for other patient deaths. He is accused of intentionally administering medical overdoses to victims so he could bring them back to life at the last moment. As the proceedings opened in the northern city of Oldenburg, the presiding judge, Sebastian Buehrmann, asked whether the charges against him were accurate. Hoegel replied “yes”. “What I have admitted...