SANFORD, Fla. - UPDATE: A prosecutor in George Zimmerman's murder trial has ended his rebuttal, saying the neighborhood watch volunteer told a series of lies in his statements about shooting Trayvon Martin.
Prosecutor John Guy argued that Zimmerman repeatedly lied about the shooting of the unarmed 17-year-old Martin.
His rebuttal came after defense attorney Mark O'Mara said prosecutors had failed to prove beyond a reasonable doubt that Zimmerman committed second-degree murder.
The jurors have taken their lunch break and Judge Debra Nelson is reading their instructions before they begin deliberations.
PREVIOUS REPORT: George Zimmerman's defense attorney began his final arguments Friday, telling jurors he will show them the neighborhood watch volunteer's "pure, unadulterated innocence" of second-degree murder when he fatally shot 17-year-old Trayvon Martin.
Attorney Mark O'Mara told jurors the burden was on prosecutors, and he said they hadn't proven Zimmerman's guilt beyond a reasonable doubt. O'Mara said prosecutors built a case on a series hypothetical "could've beens" and "maybes."
"If it hasn't been proven, it's just not there," O'Mara said. "You can't fill in the gaps. You can't connect the dots. You're not allowed to."
The six jurors could begin deliberating Friday. Because there were no eyewitnesses, the panel of six women will likely rely heavily on testimony -- which was often conflicting -- from police, neighbors, friends and family members. They will have to decide if they can determine who was yelling for help on a 911 call that recorded the shooting, and whether Zimmerman was a wannabe cop who took the law into his own hands or someone who was in a fight for his life, with his head being repeatedly slammed into the ground.
Zimmerman, 29, is charged with second-degree murder in the February 2012 shooting, but the jury will also be allowed to consider manslaughter. Under Florida's laws involving gun crimes, manslaughter could end up carrying a penalty as heavy as the one for second-degree murder: life in prison.
O'Mara dismissed the prosecution's contention that Zimmerman was a "crazy guy" patrolling his townhome complex and "looking for people to harass" when he saw Martin, an unarmed black teenager. O'Mara also disputed prosecutors claim that Zimmerman snapped when he saw Martin because there had been a rash of break-ins in the neighborhood, mostly by young black men.
Zimmerman at no point showed ill will, hate or spite during his confrontation with Martin, which is what prosecutors must prove for second-degree murder, O'Mara said.
"That presumption isn't based on any fact whatsoever," O'Mara said.
O'Mara also told jurors to ask themselves what Martin was doing during the four minutes from when he started running at the urging of a friend he was talking to on a cell phone to when he encountered Zimmerman. Martin was planning his attack instead of going back to the townhome where he was staying, O'Mara said. The defense attorney let four minutes of silence pass to emphasize the amount of time.
"The person who decided ... it was going to be a violent event, it was the guy who decided not to go home when he had a chance to," O'Mara said.
The defense attorney bolstered his arguments with a poster-board timeline of events, a power point-presentation showing witnesses who had testified and a computer-animated depiction of the fight based on Zimmerman' account.
O'Mara's conversational style contrasted prosecutor Bernie de la Rionda's booming presentation a day earlier.
De la Rionda said in his closing argument that Zimmerman assumed Martin was a criminal who was up to no good when he confronted him in his neighborhood. A scuffle followed, and Zimmerman fired his gun.
"A teenager is dead. He is dead through no fault of his own," de la Rionda said. "He is dead because a man made assumptions. ... Unfortunately because his assumptions were wrong, Trayvon Benjamin Martin no longer walks this Earth."
Judge Debra Nelson's ruling to allow consideration of the manslaughter charge came despite the objections of Zimmerman's lawyers.
To win a second-degree murder conviction, prosecutors must prove Zimmerman showed ill will, hatred or spite -- a burden the defense has argued the state failed to meet. To get a manslaughter conviction, prosecutors must show only that Zimmerman killed without lawful justification.
Allowing the jurors to consider manslaughter could give those who aren't convinced the shooting amounted to murder a way to hold Zimmerman responsible for the death of the unarmed teen.
It is standard for prosecutors in Florida murder cases