Updated

George Zimmerman's attorney said Monday that the facts in the case of the killing of unarmed Florida teenager Trayvon Martin lend themselves to a more traditional self-defense argument.

Mark O'Mara, who is defending George Zimmerman against a second-degree murder charge in the fatal February shooting, said looking at the case through traditional self-defense circumstances is appropriate because the facts suggest his client couldn't retreat from a beating he was receiving from Martin.

Zimmerman's attorneys said last week that they would use Florida's "stand your ground" law, which allows people to use deadly force — rather than retreat — if they believe their lives are in danger.

"The facts don't seem to support a 'stand your ground' defense," O'Mara said.

Still, he said Monday that the defense team will try to get the case dismissed during a 'stand your ground' hearing.

"My concern with even calling it a 'stand your ground' hearing is we need to be more realistic," O'Mara said. "I've said from Day 1 we need to wait until all the evidence comes out."

O'Mara said he thinks people have a perception about the law that isn't accurate.

"People look at 'stand your ground' and immediately think somebody's standing there with deadly force — be it a gun or a weapon — and having the opportunity to back up but not having the need to under the statute," he said. "I think the evidence in this case suggests that my client was reacting to having his nose broken and reacted to that by screaming out for help.

"He wasn't in position where I think there was any suggestion where he could retreat, which he is allowed to do under the statute."

All proceedings in Zimmerman's case are currently delayed until an appeals court decides whether to the judge in the case is biased against him.

Zimmerman says in an appeal filed Tuesday that he fears Circuit Judge Kenneth Lester is biased against him and he wants a new judge to handle his case.

Once the case starts moving again, if a judge were to side with Zimmerman in a pretrial hearing under the state's self-defense statute, the murder charge would be dismissed immediately. O'Mara said that he would not have to invoke any part of the "stand your ground" statute under the strategy he plans to use.

"I think the facts seem to support that though we have a stand-your-ground immunity hearing, what this really is, is a simple, self-defense immunity hearing," the defense attorney said.

University of Miami law professor Tamara Lave said O'Mara's shift may signal that he thinks his case for self-defense is solid even without the special provisions afforded by "stand your ground."

"'Stand your ground' makes it easier to prevail under self-defense theory than the law that existed beforehand," Lave said. "I think what he's saying is, his case is so strong that he doesn't need 'stand your ground.'"

Before O' Mara can address the 'stand your ground' hearing, he is filing an appeal this week of trial Judge Kenneth Lester's recent decision to stay on the case.

O'Mara said it could take several weeks for the Fifth District Court of Appeals to rule.

"It's their timeline," O'Mara said. "They'll try to get to it quickly, but it could take several weeks. I still think he's a good judge and very fair... But there's a real question of whether Judge Lester stepped over his bounds."

Zimmerman was initially granted $150,000 bond and released in April. But the judge revoked that bond in June after prosecutors presented evidence that Zimmerman and his wife misled the court about how much money they had, including $135,000 raised by then from a website for his legal defense. He was later freed on a new $1 million bond.

Lester denied O'Mara's motion asking for the recusal earlier this month. O'Mara argues that language used by Lester when he set Zimmerman's $1 million bond showed bias.

There isn't any new evidence to present to the appeals court in regard to Lester's standing as the trial judge, O'Mara said. Instead, the writ he was hoping to file late Monday dissects everything Lester has done since the beginning of the case.

The brief is around 40 pages long. He dismissed the notion that filing the writ was done to stall the case; rather, he said it is being done because that right would be lost if not invoked now.

Martin's Feb. 26 death in a gated community in the Orlando suburb of Sanford first drew national attention on March 8, the day his relatives held a news conference to lament that Zimmerman hadn't been arrested.

Martin was unarmed and walking back to an apartment where he was staying with his father at the time of the shooting.

Zimmerman wasn't charged with second-degree murder until 44 days after the shooting. During that time, protesters around the nation demanded Zimmerman's arrest, and the Sanford Police Department was accused of racism and incompetence.

Zimmerman, 28, pleaded not guilty and was released on a $1 million bond while he awaits trial.

With much of the administrative aspects of the case already completed, O'Mara said that they are ready to begin setting up depositions for the state's witness list. Specific dates for those to begin are still being determined, however.

O'Mara said the defense has seen about 80 to 90 percent of the state's evidence in the case and that he would start the deposition process with the first responders to the shooting.

The defense witness list is still being put together, but O'Mara said he expects it to include FBI personnel, former co-workers of Zimmerman and experts.

While O'Mara said they would actually like to move the case ahead more quickly, one of the other things complicating that desire is a lack of money in Zimmerman's legal defense fund.

O'Mara said the fund had about $60,000 in it, with $20,000 in bills that need to be paid. If Zimmerman's financial status doesn't improve soon, he may ask the judge to declare him indigent, and seek aid from the state to fund his defense expenses.

Meanwhile, Zimmerman and his wife, Shellie, continue to live in an undisclosed location somewhere in Seminole County.

In setting Zimmerman's second bond, the judge mandated that he remains in the same county as the shooting, which O'Mara said "is the most dangerous county for him to be in."

He said they are both living "like a hermit" and are not working for fear of their safety.

Based on reporting by the Associated Press.

Follow us on twitter.com/foxnewslatino
Like us at facebook.com/foxnewslatino