Iranian-born Sorour Arbabzadeh is serving a nine-year sentence for her participation in the brutal killing of Ilan Halimi in 2006 - but she is again in the headlines for having seduced two of her prison wardens.
Arbabzadeh was 17 when in January 2006 she lured the 23-year-old French Jew and led him to his abductors in a Paris suburb. Halimi was subsequently tortured for three weeks by the "Gang of Barbarians" and left naked and dying near a train track. He died during his transfer to the hospital.
Arbabzadeh had been eligible for parole after serving third of her time, but this looks unlikely after she seduced the director of the jail, Florent Goncalves, and one male warden.
Mr Goncalves, 41, admitted having sex with Emma on several occasions and now awaits trial.