Prosecutors said they had concluded that the lawyer, Shawn Snider Chapman, had nothing to do with the release of the information after all.

"The fact that the charges have been dismissed shows that what I said was true, the charges were groundless," Chapman said. "If the city attorney had contacted us before filing, they would have known this before dragging my name through the mud."

She and her co-counsel in the Olson case, J. Tony Serra, were accused of releasing addresses and phone numbers of two police witnesses. The information was posted briefly on a Web site.

Chapman could have faced up to a year in jail if convicted. She said from the beginning that she was not involved.

Serra still faces charges. He has said the information came from his office but was inadvertently released.

Olson, 54, is alleged to be a former member of the Symbionese Liberation Army, the radical group that kidnapped newspaper heiress Patty Hearst in 1974.

Olson is accused of attempting to murder Los Angeles police officers by planting bombs under police cars in 1975. The bombs did not explode.

She was indicted under her former name, Kathleen Soliah, was a fugitive until her 1999 capture in Minnesota, where she was living as a doctor's wife. Her trial is set for Sept. 4.