The closed-door administrative hearings took place on Thursday. Chief Paul noted that while Officer Lake answered all of the questions put to him at his hearing, Officer Salamoni, on the advice of his lawyer, chose not to answer questions.

The chief’s announcement was expected to bring a modicum of relief to activists and Mr. Sterling’s family members, who have grown increasingly frustrated after the state and federal decisions.

The decision also came amid tension and protests over another police shooting in Sacramento. Stephon Clark, a 22-year-old unarmed black man, was shot at more than 20 times by the police in his grandmother’s backyard on March 18. A private autopsy commissioned by Mr. Clark’s family and released Friday found that eight bullets had struck him and that his death took three to 10 minutes, raising questions about why he did not receive medical care more quickly.

Part of Mr. Sterling’s fatal encounter with the Baton Rouge officers was captured in a widely seen cellphone video, in which the officers can be seen holding down Mr. Sterling. At one point, someone can be heard saying, “He’s got a gun! Gun!”

The two officers were responding to a call that a man who fit Mr. Sterling’s description had been brandishing a gun.

One newly released video from the vantage of the convenience store shows Mr. Sterling standing by a folding table, where he appears to be doing business with two customers. Officer Lake approaches, and takes Mr. Sterling by the arm.

Footage from Mr. Salamoni’s video camera shows him approaching moments later.

The three men tussle as the officers try to bend Mr. Sterling over the hood of a car and as Officer Salamoni, using expletives, repeatedly threatens to shoot Mr. Sterling in the head. Officer Lake fires his Taser at Mr. Sterling, twice, and Officer Salamoni tackles him to the ground.