Michael Dunn trial update: Saturday is day 4 of deliberations for jury

(CNN) -- Jurors will return Saturday morning to try to decide the fate of Michael Dunn, a man accused of shooting and killing an unarmed teenager in Florida.

Dunn is charged with first-degree murder in the November 2012 death of 17-year-old Jordan Davis in Jacksonville. He was one of four black teenagers who were in an SUV fired upon by Dunn -- who is white.

The violence erupted after an argument over loud music.

Some have compared the Dunn case to the trial of George Zimmerman in the killing of teenager Trayvon Martin, which, like the current trial, had racial overtones and claims of self-defense.

But Dunn's defense attorney Cory Strolla told CNN's Chris Cuomo on Friday that the Zimmerman and Dunn cases aren't so similar in his mind.

There was a physical confrontation between Zimmerman and Martin, and police gave Zimmerman the benefit of the doubt about defending himself, Strolla said.

"My client did not wait to become that victim; my client did not wait to either get assaulted by a weapon or have someone potentially pull a trigger," he said.

Unlike the Zimmerman case, police rushed to charge Dunn with murder, the defense attorney said.

"They already made up their mind before they even had the evidence basically looked at and put together," he said.

Even though a weapon was never found, Strolla maintains the youths could have had one. Dunn felt threatened and acted to defend himself, he said.

"Now, does it sound irrational? Of course it sounds irrational. But have you ever been in that situation?" Strolla said.

Jury cannot decide

The jury in Dunn's case deliberated all day Friday, only to send a message to the judge shortly before 7 p.m. that they had "reached a wall for the evening." In other words, for the second straight day they hadn't reached a decision.

Judge Russell Healey released them back to their hotel so that they could return for deliberations around 9 a.m. Saturday.

"This is one admirable group," Healey told the court shortly before dismissing the jury. "They are clearly taking this thing as seriously as they should. And I couldn't be more proud of them for how hard they are working."

This announcement capped a relatively uneventful day Friday, after what had been an emotional and eventful trial.

The closest thing to news came shortly before 5 p.m., when Judge Healey answered a question from the jury: Is it possible to not reach a verdict on one count and reach a verdict on other counts?

To which Healey responded: Yes.

Prosecutors contend that Dunn's firing into the SUV equates to an act of murder. In addition to that count, Dunn also has been charged with three counts of attempted murder. If found guilty, he faces up to life in prison.

A "comprehensive public safety plan" has been established ahead of a verdict in the case, according to the Duval County joint information center handling the Dunn trial.

"All contingencies have been planned for," the Duval County statement said. "We will not discuss the specifics of any security plan. We will continue to protect the rights of those who choose to peaceably demonstrate."

CNN's Tom Watkins and John Couwels contributed to this report.

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