criminalprofiler:

Some Facts about Female Serial Killers

• they are more efficient than their male counterparts, and often kill more people
• they are twice as likely to have killed someone close to them than the males
• in a study by Kelleher and Kelleher of 100 female serial killers, it took an average of 8 years to catch them - twice as long as the average to catch a man

The Motives of Female Serial Killers

• Money (74%)
• Control (13%)
• Enjoyment (11%)
• Sex (10%)
• Drugs, cult involvement, cover up, or feelings of inadequacy (24%)

The Weapons Female Serial Killers Choose

• Poison (80%)
• Shooting (20%)
• Bludgeoning (16%)
• Suffocation (16%)
• Stabbing (11%)
• Drowning (5%)