A German nurse who allegedly killed his victims out of boredom has been charged with 97 murders, potentially making him one of the country's deadliest serial killers.<br />The nurse, Niels Hoegel, was already serving a life sentence for six convictions, including homicide and attempted homicide. He was charged with another 97 murders Monday, prosecutors said in a press release. He is accused of giving victims various non-prescribed drugs in an attempt to show off his resuscitation skills to colleagues and fight off boredom. <br />
