Seems most likely it would be a man. On the other hand, as Congreve penned, "Heaven has no rage like love to hatred turned, Nor hell a fury like a woman scorned." I don't think men have a monopoly on homicidal acts.
My guess is this poll was conceived as a thesis topic for a degree in Women's Studies from a tuition-free college, and conducted by the student on a field trip to a Malibu rehab clinic.
But, I could be wrong.