"So when a person might seem sympathetic, to me it's indifferent," he said.
O'Mara also asked the jurors about when they thought self-defense could be used. Juror H-6, a white man in his 30s, said he thought deadly force could be warranted if a person feels danger.
"I feel that if you're somewhere you're supposed to be and allowed to be, you should have the right to defend yourself," he said.
O'Mara met resistance from the judge when he tried to characterize the definition for justifiable use of deadly force.
Prosecutor Bernie de la Rionda objected multiple times during O'Mara's line of questioning, eventually leading to Judge Debra Nelson to twice read what will be the jury instruction once the final jury is selection.
"I don't want either side to give an interpretation on the law," Nelson said.
O'Mara said screening the prospective jurors for any biases or prejudices "is probably as critical if not more critical than the evidence."
"If you bring that into the courtroom, then what we can't get is a fair verdict," he said.