'Most Prolific' Serial Killer in US History Sentenced to Death

What puts him in contention for consideration as being the 'most prolific' serial killer in US history; 130 suspected victims with the belief their could be many more. Rodney Alcala, known as the Dating Game Killer, was sentenced to death for the murder of a handful of his victims.

http://www.dailymail.co.uk/news/worldnews/article-1262485/Rodney-Alcala-sentenced-death-murders-women-girl-12.html

"Police have released more than 100 photographs of unidentified women and girls amid fears they could be the victims of America's worst ever serial killer.

The pictures were taken by Rodney Alcala, who was sentenced to death by lethal injection for the savage murders of a 12-year-old girl and four women.

However, the 66-year-old has admitted killing another 30 women in the 1970s and police believe there could be many more victims."