s a crime on elderly .An Austrian missionary nun was killed in her home on KwaZulu-Natal, in South Africa, on April 19, the Fides news agency reports. The body of Sister Stefani Tiefenbacher was discovered early on Sunday morning. The 86-year-old woman had been bound, gagged, and sexually assaulted before being suffocated. Sister Tiefenbacher, a Missionary Sister of the Precious Blood, had worked with the poor in South Africa for 60 years.