Oldenburg - A German nurse who estimates he killed about 30 patients with injections of a cardiac drug was jailed for life on Thursday on two specimen murder charges.
Niels H, aged 38, whose full name has been withheld under privacy guidelines for media, is already serving seven-and-a-half years in prison on a 2008 conviction for an attempted murder at the hospital.
Judges added a rider recommending no release when he comes up for parole after the usual 15 years.