The Cain Children

Could you take a life? Maybe, but could you kill a child?
What if you knew that the child would grow up to be a monster and there was nothing you could do to stop it... Other than euthanasia. Could you, would you, kill a seemingly innocent person (child) to protect society in the future? Would you detest those that sentence a child to the death penalty before they have even committed a crime?
In the not so distant future, scientists stumbled upon a discovery. They learned to isolate and identify the gene in a child's DNA that makes them susceptible to killing for pleasure, to become a serial murderer. Not every child with the gene kills, but every serial killer has this gene, called the Cain gene after the first murderer in the bible.
There is no cure for the gene and since not every child with the gene kills, a new government agency called the guardians is created. They are instituted to monitor the children born with the genes and to take appropriate actions once the genes manifests itself and they prove to be killers.
Only carriers of this gene can pass it along to their children, so even those that don't kill, can sire children that may.
There is the dilemma, end the outbreak by possibly killing the innocent, or eliminate all carriers to end all possible murder in the future.
Follow this story of the Cain children as well as the scientists that monitor them while posing as their parents.
This book is not for the faint of heart as it contains descriptive accounts of murders, rape, and torture.