Top 10 Most Prolific Serial Murderers in History #7 Posted by Marianne D on August 19, 2013 in Top 10 Most Prolific Serial Muderers in History | 10739 Views | Leave a response #7 – Bruno Ludke Ludke (Image Source) Ludke was a German serial killer who is thought to have committed 51 murders between 1928 and 1943. Declared insane, Ludke was sent to a Vienna hospital by Nazi authorities where he died as a result of medical experimentation. Previous Next