DENVER -- Prosecutors said they won't file charges against a police officer who was videotaped pushing a protester to the ground during the Democratic National Convention in Denver.

District Attorney Mitch Morrissey said 24-year-old Alicia Forrest of Los Angeles disobeyed warnings to back away before Denver police officer Scott Stewart shoved her with his baton and said, "Back up, b----."

The incident was videotaped by a Rocky Mountain News photographer and the video was posted on YouTube.

Morrissey said Forrest grabbed the baton and pushed it away before Stewart pushed her.

Police took Forrest to the warehouse processing center, dubbed "Gitmo on the Platte" by protesters. She was then transferred to the city jail and posted a $580 bond.

Forrest, a member of the group Code Pink, was among 154 people arrested before and during the convention Aug. 25-28. No listed phone number could be found for her, and an after-hours call to Code Pink was not immediately returned.

Her attorney, Dan Recht, calls the decision not to prosecute the officer "outrageous." He said she hasn't decided whether to file a civil suit.