https://www.psychologytoday.com/us/blog/evolution-the-self/201204/why-do-women-fall-serial-killers their love can transform the convict: from cunning and cruel, to caring, concerned, and compassionate.
there’s a wounded child nested somewhere inside the killer that can be healed through a devoted nurturance that only they can provide.
they might share the killer’s media spotlight, and so triumphantly emerge from their anonymity, and maybe in the process even land a book or movie deal (an aspiration about as cynical as it is narcissistic and self-serving).