The court earlier heard a closing argument from the prosecution, with attorney Jeffrey Paulsen telling jurors Castile was reaching for his license when he was shot by a nervous police officer.
Officer Jeronimo Yanez fatally shot Philando Castile, a 32-year-old cafeteria worker during a traffic stop on July 6, 2016. Castile's girlfriend streamed the immediate aftermath live on Facebook, which brought the case extra attention. At stake are charges of second-degree manslaughter and two lesser counts of endangering the safety of Castile's girlfriend, Diamond Reynolds, and her daughter, who were both in the auto when Yanez fired seven rounds at Castile.
Castile told the officer he had a gun but failed to tell him that he had a permit to carry it, Gray explained to jurors.
Yanez testified Friday that he clearly saw a gun and that Castile ignored his commands to stop pulling it out of his pocket.
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 auto near them.
In his statement to the BCA about what he saw in Castile's hand, Paulsen claimed Yanez said, "I know he had an object and it was dark".
Gray used his closing argument to tell the jury that Yanez had plenty of justification for shooting.
Yanez previously said he was justified in stopping Castile's auto because he resembled a suspect in a convenience store robbery, court documents said.
When Castile was telling Yanez that he was "not reaching for it", Yanez admitted that he was experiencing tunnel vision simultaneously, Paulsen argued.
After Castile was stopped, Yanez asked him to present his driver's license and insurance card.
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Yanez took the stand in his own defense on Friday afternoon.
Castile was shot seconds after he informed Yanez he was carrying a gun. Gray hit the issue again in his closing.
He also contested the state's argument that Yanez should have told Castile that he resembled a robbery suspect from four days prior.
While Yanez remained firm that he saw a gun, he acknowledged he was under tremendous stress during the incident.
Yanez resorted to deadly force "before he was sure", Paulsen said.
Jury deliberations will continue Tuesday at 9 a.m.
"I know that people are not protected against the police", she said, according to Minneapolis-based reporter Jon Collins.
He said it was reasonable to deduce that Castile had smoked marijuana the day of the shooting because THC, the main psychoactive chemical in cannabis, was found in his blood.
Prosecutors say Yanez acted negligently in using deadly force and had not given clear instructions.