Complex sentence: Bothwell was detained for administrative reason, the real impetus being Anna's complaint against him for purloining her dowry and her legal suit that he had "three wives alive" including herself Gjerset, Knut Ph.D (1915) History of the Norwegian People.
Split into simpler sentences: Bothwell was detained for administrative reason, the real impetus being Anna's complaint against him. A court case ensued, whereby she gave testimony putting forth that he had "three wives alive" including herself Gjerset, Knut Ph.D (1915) History of the Norwegian People.