One of the most common reasons given by women who date serial killers is the fact that they 'see' the little boy that the horrible man once used to be, and they believe that they can nurture that kid, hence removing the cruel and harmful nature of the killers and making them amicable again.
Known as 'serial killer groupies' or even 'prison groupies' by some, a great number of these women have shown a surprising desire to get connected to the serial killer of their choice. A large number of these women have become directly aligned with these killers, and some have even married these hardened criminals.
Groupies will do almost anything to get close to the prisoner that they are attracted to. They give up jobs, family, spend money on him, and even move across country to be in the same town as him. Some SKG's are attracted to the celebrity status they acquire. They go on talk shows to announce their undying love for the serial killer and proclaim that he was not capable of these killings.
This book depicts several such cases and you'll meet some of these SKG's.