Chihuahua State police have released a sketch of Diana la Cazadora -- or "Diana, the Hunter" as she allegedly calls herself.
She is the Juarez woman sought for allegedly shooting two bus drivers in the head after boarding their respective buses.
In an email to authorities, a woman who claimed responsibility for the killings identified herself as Diana la Cazadora.
She said she did it to avenge the deaths and rapes of women in Juarez.
"I myself and other women have suffered in silence but we can't stay quiet anymore," the woman said in the email.
State police say she claimed the bus drivers -- Jose Roberto Flores Carrera and Fredy Zarate Morales -- took park in the killings of women.