Top 10 Most Prolific Serial Murderers in History #4 Posted by Marianne D on August 19, 2013 in Top 10 Most Prolific Serial Muderers in History | 11404 Views | Leave a response #4 – Javed Iqbal Iqbal (Image Source) Pakistani Iqbal claimed to have murdered 100 boys over an 18 month period in the late 90s. He drugged, raped and strangled the boys before disposing of their bodies using hydrochloric acid. He was sentenced to death in 2000. Previous Next