For the past four months, the jury has listened to testimony, including 18 days from Arias, leading up to today's closing arguments.
Prosecutors maintain Arias killed her ex-boyfriend Travis Alexander in a jealous rage at his Mesa home in June 2008, while the defense maintains Arias killed him in self-defense.
Arias would be eligible for a death sentence if convicted of first-degree murder.
Prosecutor Juan Martinez later addressed the jury with his closing arguments before a courtroom packed with family, media and curious onlookers. People began lining up outside Maricopa County Superior Court about 2 a.m. to vie for 11 available seats through a lottery system. Holders of cards with an "X" were allowed in the courtroom.
The lottery involving 67 people delayed the start of Thursday's proceedings until nearly 10:30 a.m.
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