OAKLAND -- On July 16, 2009, video surveillance cameras outside the Arrwa One Stop Market on 86th and Bancroft avenues captured Laron Logwood shooting Edwin Grady at point-blank range in the chest.

Now one question could determine whether Logwood will serve decades in prison, even possibly a life sentence, for killing 25-year-old Grady.

That question is whether Logwood shot Grady, a local drug dealer, because he feared the man was reaching for a gun or whether it was a cold-blooded attack.

"This was an ambush," said deputy district attorney Tim Wellman, arguing the latter and asking jurors to return a verdict of murder in the first degree.

Logwood, 36, thought about what he was going to do and did it, Wellman said during closing arguments Tuesday. "And that is why he is guilty of murder."

Hoping to convince a jury that the killing was conducted in self-defense, Logwood said he feared for his life and that of his friends when he decided to pull out his handgun in the middle of the afternoon and shoot Grady dead outside the store.

He admitted during testimony in December that Grady never pointed a gun at him and admitted that he gave Grady no warning before he fired a single shot, at point-blank range.

While police did not find a gun on Grady when they responded to the shooting, Logwood said he was sure Grady had a gun and that he saw it through Grady's T-shirt.

Friends and family in the courtroom gasped, some crying, at the sight of photographs displayed by Wellman Tuesday of Grady after his death, a single bullet wound to his chest.

"We know what happened from the video," Logwood's attorney, William DuBois, told jurors. Whether it was murder, manslaughter or self-defense, he said, "depends entirely on the state of mind of Laron Logwood."

DuBois argued the gun was taken by Grady's friends after the shooting and that his client suffers from a form of post-traumatic stress disorder that has caused him to have a heightened level of fear on the violent streets of Oakland.

"Shoot before you get shot. That is his experience," DuBois said.

"Laron Logwood is not guilty of murder. The worst you could say about him is that he acted rashly," DuBois said. "He is entitled to your verdict of not guilty."

The case continues 1 p.m. Wednesday when jurors return for instructions then begin deliberations.