Nah it actually wasn't the judge's fault his hands were tied. It's the fault of the jury and the FL legislature who came up with these retarded mandatory laws. A lot of states have them.
She choose to forego a plea deal and fight the case with a stand your ground defense, and when she lost, the mandatory minimum that states you get an automatic 20 years for firing a gun while committing a felony kicks in and the judge has no discretion to reduce it.
In a sane world, she wouldn't gotten about 10 days on jail, a fine, and some probation.