(CNN) -- The jury weighing the fate of Michael Dunn -- the white man who shot into a SUV with black teens after he had asked them to turn down their music -- have reached a verdict on four counts, but not the fifth and most severe one, a judge said Saturday.
Judge Russell Healey announced around 4:45 p.m. that the 12 jurors had sent a note saying they'd decided on four of the five counts that Dunn faces. But they haven't unanimously reached a verdict "on count 1 or any of the lesser included offenses."
Count 1 is first-degree murder. Jurors could decide not to convict Dunn on that charge but instead find him guilty on lesser charges such as manslaughter.
After making his announcement, Healey then told the jury to continue their deliberations in hopes of a breakthrough on this crucial count.
If they still can't decide after some length of time -- perhaps a few more hours or days -- a hung jury on this count is possible.
Earlier Saturday, Healey had acknowledged that the jury of four white females, two black females, four white males, an Asian female and a Hispanic male was "struggling, obviously."
"But it's not for want of trying to reconcile all of this," the judge said. "I think we've got some analytical people in there who are trying to do just that -- trying to analyze this from every possible angle."
After these comments, the judge laid out and answered the questions the jury had submitted within half an hour of resuming its deliberations on Saturday morning.
Here's what jurors asked, and how he responded:
-- "Is the defense of self-defense separate for each person in each count?" Judge: "Yes."
-- "Are we determining if deadly force is justified against each person in each count?" Judge: "Yes."
-- "Or, if we determine deadly force is justified against one person, is it justified against the others?" Judge: "No. Self-defense and justifiable use of deadly force applies separately to each count."
Echoes of Trayvon Martin's death
It was November 23, 2012, when Michael Dunn pulled into a gas station in Jacksonville, parking next to a red SUV full of teenagers.
Loud music was coming from that car, and Dunn expressed his displeasure.
What came next is a subject of dispute. Clearly, there were words exchanged. And without doubt, Dunn ended up opening fire on the vehicle, killing Davis.
But did one of the teens flash a gun? Dunn says so, but prosecutors say that's not true -- pointing to the fact the teens were unarmed. And was the defendant acting in self-defense? Again, the two sides come to opposite conclusions.
Some have compared the Dunn case to the trial of George Zimmerman in the killing of Florida teenager Trayvon Martin, which, like the current trial, had racial overtones and claims of self-defense.
Martin's own parents have said as much, claiming Davis' killing is another reminder that in Florida, "racial profiling and stereotypes" may serve as the basis for illegitimate fear "and the shooting and killing of young teenagers."
But Dunn's defense attorney, Cory Strolla, told CNN's Chris Cuomo on Friday that the Zimmerman and Dunn cases aren't so similar.
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," he said. "My client did not wait to either get assaulted by a weapon or have someone potentially pull a trigger," he said.
Though a weapon was never found, Strolla maintains the youths could have had one. Dunn felt threatened and acted, he said.
"Now, does it sound irrational? Of course it sounds irrational. But have you ever been in that situation?" Strolla asked.
Given the attention and emotions tied to this case, a "comprehensive public safety plan" has been established ahead of a verdict, according to the Duval County joint information center handling the Dunn trial.
"All contingencies have been planned for," the 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."
Whatever the verdict, Davis' parents, Ron Davis and Lucia McBath, will never see their son again, they noted, adding, "We know that pain all too well. We walk with Jordan in defining his legacy to reflect our hopes by advancing love and tolerance in his memory, and continuing the fight against unjust gun laws."
"Tomorrow is my boy's 19th birthday," his mother tweeted Saturday. "I pray we will celebrate not only him but a just and righteous verdict. Patiently we wait."