Landry made the announcement after meeting with family members of Sterling.
"I know the Sterling family is hurting", Landry said.
Sterling, a 37-year-old black father of five, was shot six times by officer Blane Salamoni on 5 July 2016.
A video of Sterling's shooting went viral after his death, showing an officer tackling him to the ground before another officer shot him, inciting social media backlash and protests across the country. "I know they may not agree with this decision", Landry concluded.
"They're not going to bring charges on anybody".
During a 90-second encounter, Salamoni told Sterling, "I'll kill you, bitch", before the officers told him to put his hands on the hood of the vehicle. Louisiana's attorney general has ruled out criminal charges against the two white officers in the fatal shooting of Sterling. Salamoni's lawyer, John McLindon, said he anticipated the department will fire both officers for a violation of policies as a result of the shooting, but that both officers are planning to appeal such firing.
Police said that Sterling had a gun in his pocket, but Sterling's relatives disputed that claim, The New York Times reported.
The Department of Justice said last spring that Salamoni put a gun to Stering's head when Sterling refused the officers' order to put his hands on the hood of a auto.
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Afterward, the camera captures Sterling with a large bloodstain on his chest as an officer on the ground next to him keeps his gun pointed at him.
Civil rights activists have blamed the officers for escalating tensions during the arrest in a convenience store parking lot and turning it into a deadly encounter.
After the hearings, Paul said, police will release four additional videos: two body camera recordings; one from a store surveillance camera; and one from the dashboard camera in a patrol auto.
Federal authorities said their ten-month investigation failed to uncover evidence that the officers "willfully" deprived Sterling of his civil rights. Baton Rouge Police Chief Murphy Paul said Tuesday that his department still intends to complete disciplinary hearings for the officers, including releasing findings such as dash-cam video.
The officers encountered Sterling after responding to a report of a man with a gun outside the Triple S Food Mart.
At one point, videos show, someone shouts, "He's got a gun!"
Ieshia Evans is detained by law enforcement as she protests the shooting death of Alton Sterling near the headquarters of the Baton Rouge Police Department on July 9, 2016. Sterling, was shot and killed outside the store where he was selling CDs by Baton Rouge police.
Police prepared for another round of protests before the Justice Department announced its decision a year ago, but the response was far more subdued.