#1 serial killer. Conclusion

40 serial killers Pisces (not including Usama Bin Laden)

Evgeni Chupminski, Shi Yuczun, Shuvalov Pavel, Oleg Chizhov, Michael Harris, Fokin Victor, Sifo Tvala, Tul Ottis, Christopher Wilder, Rassel Williams, Aileen Wuornos, Morris Solomon, Spesivcev, Michail Popkov, Ramires Richards, Dennis Raider, Rembert Robert, Ocampo, Sergei Osipenko, Modzelevski Stanislav, Steven Peter Morin, Tereza Norr, Eduard Lukov, Randi Craft, Crowford, Andre, Antoni Cook, Eric Cook, Eduard Lukov, Daglas Klark, Diogo Alves, Dmitri Balakin, Donald Gaskins, John Gasy, Goer Ladislav, Gridin Dmitri, Joseph Edward Dunkan, Jackson Calvin, Wilbour Jenniki, Draganer. 

Scorpio (38):

Bai Baoshan, Margie Barfield, Barch Yurgen, Oleg Belov, Gannes Belle, Gao Chenyun, David Bullock, Britt Eugene, Gilbert Christine, Kaetano Santos, Joseph Deandzhelo, Geralds Hewbert, Nikolai Zhumagaliev, Zaikin Oleg, Nikolai Kozlenia, Kocks Scott, Adolfo de Jesus, Mary Ann, Alton Coulman, Nathaniel Cook, Kurita Gandzo, Lake Leonard, Li Derrick, John Rodni, Pikton Robert, Alfredo Pito, James Ritchi, Manuel Romansanta, John McCay, Vladimir Mirgorod, Mozeph Seathall, Scott Frederick, Chester Turner, Travis Mori, Fridrich Haarman, Watts Carl, Juan Yun, Williams Hens

The first two places are water signs: Pisces and Scorpio. Earth is second: Virgo and Capricorn 

Top three serial killers: 40 Pisces, 38 Scorpios, 32 Virgos. Leaders among water. Aquatic Pisces are idealistic and they kill to make the world a better place. Elin Wuornos killed male clients who wanted to rape her. Popkov killed walking women who cheated on boyfriends and husbands. He called himself a cleaner. Bin Laden was preparing a terrorist attack out of revenge against the American government for the pain of the Arab people and for the religion of Islam.

Virgos and Capricorns follow Pisces and Scorios. Water and earth are the most dangerous elements, and fire and air are less. Water and earth do not particularly like people, and air-fiery ones are closer to people. Water: the exception is safe Cancer, the dangerous Aries is from fire

The least dangerous element is air. There are no air signs in the top 5 serial killers, there are all the other elements.

#1 serial killer

Out of 320 known dates of birth I found here (wiki on all famous serial killers ever existed), #1 is Pisces.

Pisces - 40, Scorpio - 38, Virgo - 33, Capricorn - 30 and Aries- 31, Aquarius - 27, Saggiatarius - 27, Libra - 23, Taurus 21, Gemini - 19, Leo 17, Cancer- 18. 

Russia's most horrible killer is Mikhail Popkov (more than 80 murders) is Pisces and Aileen Wuornos is Pisces. Pisces is an idealistic sign and kills because of trying to make people better and mostly the reason is heartbreak. Popkov wanted women to be loyal to their boyfriends or husbands. His wife cheated on him and he kept angry with all women. Wuornos was a victim of rape when working as a prostitute and killed clients who tried to rape her. She killed 7 men and says how horrible men are in her interview. 

Anthony Cook dark skinned hated and killed the white only as a revenge for discrimination 

Pisces Osama Bin Laden did not forgive the American government for the pain they caused to the Arab nation. 3000 were killed as a result of his organized attack. I did not include him into serial killers - would be 41

Scorpio has a reputation of a sadistic sign that loves to see others suffer. No wonder it is second after Pisces. 

Virgo is third. 

Capricorn is a cruel sign, 4th. 

Aries is one of the violent signs. Aries probably kills to be cool or to become famous. I see Aries as a defective sign.