Who are the best serial killers in the history?
Who are the best serial killers in the history of humankind is a question that intrigues everyone. Serial killers are criminals who are engaged in killing three or four people usually in service of abnormal psychological gratification. Over the decades, we have come across several grave serial killers and their stories that can send chills down in our spines. Hence, if you are looking for the list of gruesome serial killers in the history of humankind, then go through the following list.