Jewish Encyclopedia Volume 3 p70 states:

About the same time, the court Jew Lippold, favorite of the elector Joachim II., became especially important, he having been entrusted by the latter with the superintendence of all Jewish affairs. When Joachim died suddenly (1571), his successor, Johann Georg, accused Lippold of having murdered the elector. Lippold's admissions on the rack, and the books on magic found in his possession, furnished to his enemies sufficient evidence to procure his condemnation and execution (Jan. 28, 1573). Again an expulsion of the Jews followed.