Los Angeles city attorney spokesman Frank Mateljan says prosecutors declined to pursue a case due to insufficient evidence. He says they didn't offer further details.
A spokeswoman for John Kerry said last week that the Massachusetts senator's daughter was pulled over for an expired registration and released after a breathalyzer test showed her blood-alcohol level was under the legal limit.
Mateljan says Alexandra Kerry isn't facing any other charges. The 36-year-old has produced documentaries and has had several small acting roles.
