Download or read book Unsolved Serial Killings written by RJ Parker and published by . This book was released on 2011-12-08 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Law enforcements, both local and federal, estimate that there are between 35 and 50 serial killers on the loose and active in the United States alone. Some even put the number closer in the hundreds. In any case, officials anticipate these numbers to continue rising. Knowing that there is someone stalking the streets that you live on, looking for victims, is very scary.