ST. PAUL — A Minnesota police officer who fatally shot a black motorist seconds after the man informed him he was carrying a gun “did what he had to do” in a thoroughly justified use of force, a defense attorney argued Monday.

But hours earlier, prosecutors insisted that officer Jeronimo Yanez never saw a gun and had plenty of options short of shooting Philando Castile, a 32-year-old school cafeteria worker they say was never a threat.

Yanez’s manslaughter trial went to a jury after both sides gave closing arguments in which they recapped their versions of a shooting that drew extra attention because Castile’s girlfriend livestreamed the gruesome aftermath on Facebook. The jury deliberated about half a day without a verdict. Jurors were to return Tuesday morning.

Yanez’s attorney, Earl Gray, reminded the jury of the officer’s testimony that Castile looked like a man who robbed a convenience store four days earlier. He said Castile disregarded the officer’s orders and reached for his gun because he was stoned on marijuana. And he said Yanez was afraid for his life.

“He pulled out his gun, and he did what he had to do,” Gray said.

Prosecutor Jeff Paulsen highlighted autopsy evidence in his closing argument, reminding the jury of a bullet wound to what would have been Castile’s trigger finger — and that there was no corresponding bullet damage nor wounds in the area of Castile’s right shorts pocket, where he carried his gun. He also cited testimony from first responders who saw Castile’s gun in his pocket as he was loaded onto a backboard.

He asked the jury to consider what might have happened if Yanez, when told of the gun, had simply stepped back a few feet to better assess the situation. The officer might have heard Castile say he was just trying to get his wallet, Paulsen said.

“If he had done that, everybody would have gone home safely that night,” the prosecutor said. He also alluded to testimony from defense witnesses who portrayed Yanez as a good and honest man.

“The victim in this case was a good man too,” Paulsen said, and referred to Castile’s job at an elementary school. “The kids loved him, and he was a role model to them. And now they’ve been deprived of that role model.”

Castile had THC, the high-giving component of marijuana, in his blood when he died. The two sides called competing experts earlier who disagreed over whether Castile was intoxicated. Gray hit the issue again in his closing.

“Guns and drugs don’t mix. This is a classic example of why, if you are a user of drugs, even marijuana, you’re not allowed to have a gun,” Gray said.

Yanez, 29, who is Latino, is charged with second-degree manslaughter, punishable by up to 10 years in prison, and with two lesser counts of endangering the safety of Castile’s girlfriend, Diamond Reynolds, and her daughter for firing his gun into the car near them.