The decision announced Thursday came about five months after the LAPD turned over the results of its internal investigation into the June 23 incident.
The DA's office said there was insufficient evidence to charge any of the officers involved, including one man who was video-taped hitting a 36-year-old suspected car thief 11 times with a flashlight, the Los Angeles Daily News reported Friday.
"I saw what everyone else saw on those videotapes. Chief (William) Bratton has broad administrative authority," Hahn said. "I have every expectation that he will look at all of the officers' conduct and measure that against LAPD training, policies and procedures."
The Daily News said Hahn called on Bratton to take "all appropriate actions."
Deputy District Attorney Dale Murphy said the suspect "suffered relatively few blows and they were with relatively little force.
"The suspect," Murphy said, "suffered no pain that required anything more than Tylenol."