The 32-year-old Arias has been charged with first-degree murder in the June 2008 death of her one-time boyfriend, Travis Alexander, at his suburban Phoenix home. He was shot in the head and stabbed and slashed nearly 30 times. Jurors could also convict her of second-degree murder or manslaughter.
Prosecutors say Arias planned the attack in a jealous rage.
Arias initially denied involvement, then blamed it on two masked intruders. Two years after her arrest, she said she killed Alexander in self-defense.
Testimony in the case began in early January, and Arias spent 18 days on the witness stand beginning in early February.
The trial has been a made-for-the-tabloids drama, garnering daily coverage by the cable news networks, with of a salacious relationship that ended in a bloody killing.