Alexander's naked body was found crammed in a stand-up shower in June 2008 after he missed two appointments, prompting friends to go to his house. He had been stabbed 29 times in the back and torso and shot in the head. His throat was slit.
After her arrest, Arias told an elaborate lie about masked intruders breaking into Alexander's house and killing him before she narrowly escaped.
Relatives who spoke with police described her as mentally unstable.