A few FEMALE murderers: (from wikipedia)

Nicole Abusharif
Rosie Alfaro
Wanda Jean Allen
Wendi Andriano
Jodi Arias
China P. Arnold
Marie Dean Arrington
Susan Atkins
Lena Baker
Gertrude Baniszewski
Maria Barbella
Suzanne Basso
Celeste Beard
Betty Lou Beets
Laurie Bembenek
Ann Bilansky
Lynda Lyon Block
Cordelia Botkin
Kathy Boudin
Betty Broderick
Lavinia Burnett
Attina Marie Cannaday
Linda Carty
Stacey Castor
Virginia Christian
Brenda Clubine
Jill Coit
Tiffany Cole
Paula Cooper
Natasha Cornett
Mary Frances Creighton
Alice Crimmins
Kerry Lyn Dalton
Laurie Dann
Marybeth Davis
Regina and Margaret DeFrancisco
Marissa DeVault
Kathleen Dorsett
Raynella Dossett Leath
Diane Downs
Laura Ann Doyle
Roxana Druse
Eva Dugan
Kristina Fetters
Mary Jane Fonder
Priscilla Ford
Antoinette Frank
Caril Ann Fugate
Margaret Garner
Kelly Gissendaner
Barbara Graham
Debora Green
Malaika Griffin
Amy Grossberg
I. Kathleen Hagen
Emily Harris
Jean Harris
Elizabeth Haysom
Toni Jo Henry
Audrey Marie Hilley
Brittany Holberg
Waneta Hoyt
Carla Hughes
Banita Jacks
Eleanor Jarman
Angela Johnson
Martha Ann Johnson
Genene Jones
Winnie Ruth Judd
Lois Jurgens
Marcia Kelly
Penelope Kenny
Sante Kimes
Lizzie Lloyd King
Sharon Kinne
Hannah Hanson Kinney
Theresa Knorr
Michelle Knotek
Sarah Kolb
Patricia Krenwinkel
Sara Kruzan
Sheila LaBarre
Deanna Laney
Stacey Lannert
Stephanie Lazarus
Teresa Lewis
Nellie May Madison
Crystal Mangum
Florence Maybrick
Karen McCarron
Kimberly McCarthy
Ruby McCollum
Melanie McGuire
Emeline Meaker
Sharee Miller
Alice Mitchell
Lisa M. Montgomery
Blanche Taylor Moore
Omaima Nelson
Frances Newton
Stella Nickell
Hannah Ocuish
Barbara Opel
Marjorie Ann Orbin
Christine Paolilla
Elaine Parent
Louise Peete
Sarah Jo Pender
Christa Pike
Martha M. Place
Susan Polk
Tina Resch
Christina Marie Riggs
Donna Roberts
Angelina Rodriguez
Chipita Rodriguez
Kristin Rossum
Darlie Routier
Robin Lee Row
Margaret Rudin
Yolanda Saldívar
Jennifer San Marco
Julie Schenecker
Irene Schroeder
Courtney Schulhoff
Larissa Schuster
Nancy Seaman
Sylvia Seegrist
Karen Severson
Assata Shakur
Dorothy Sherwood
Erika Sifrit
Frankie Stewart Silver
Sarah Simpson
Pamela Smart
Susan Smith
Ruth Snyder
Lyda Southard
Brenda Spencer
Bathsheba Spooner
Barbara Stager
Mary Surratt
Della Sutorius
Marybeth Tinning
Kimberly Dawn Trenor
Karla Faye Tucker
Lynn Turner
Leslie Van Houten
Elizabeth Van Valkenburgh
Reetika Vazirani
Rachel Wade
Carolyn Warmus
Martha Wise
Susan Wright
Diane Zamora