During the World War I Niemeyer was imprisoned because of preaching in German. His health weakened therefore and shortly after his release he died in 1920. His son Wilhelm Niemeyer took over the church's leadership. He was ordained as apostle already in 1912. From 1918 on the language in which divine services were held was changed from German to English. At this time there probably still existed a prophet's office which calls the other offices. It obviously was abolished afterwards as then visions and dreams revealed new talents for church ministries.