Steven Eugene Washington, 27, was shot to death last March near Koreatown.
Beck found that the officers made serious tactical mistakes, but ultimately were justified in using deadly force.
According to police reports, Corrales and Diego heard a loud noise while they were on patrol around Koreatown. They saw Washington walking near the noise and drove up beside him.
The officers said Washington appeared to remove something from his waistband and did not follow orders to raise his hands. That's when one of the officers fired a single shot at Washington. He was struck in the head.
The shooting drew sharp criticism from Washington's family, who said the man was autistic and fearful of strangers. The American Civil Liberties Union of Southern California urged police to re-examine its policies.
The Associated Press contributed to this report.