It's because she is a woman

http://www.cnn.com/2012/05/11/justice/florida-stand-ground-sentencing

Florida woman sentenced to 20 years in controversial warning shot case

By the CNN Wire Staff

updated 9:55 PM EDT, Fri May 11, 2012

Singing protesters thrown out of court

STORY HIGHLIGHTS

• A judge issues a 20-year sentence to woman who fired warning shot inside her house
• Judge James Daniel says he had no choice in the sentence
• Marissa Alexander says she fired the warning shot to fend off her abusive husband
• A congresswoman confronts prosecutor Angela Corey after the sentencing

(CNN) -- Saying he had no discretion under state law, a judge sentenced a Jacksonville, Florida, woman to 20 years in prison Friday for firing a warning shot in an effort to scare off her abusive husband.
Marissa Alexander unsuccessfully tried to use Florida's controversial "stand your ground" law to derail the prosecution, but a jury in March convicted her of aggravated assault after just 12 minutes of