Annette McDonald of San Pedro, a former aide to Janice Hahn, was found guilty this week of petty theft and sentenced to 10 days of community service for stealing a campaign lawn sign of Hahn’s opponent in the county supervisor’s race.

The incident occurred in August 2016 during what had become a competitive race between Hahn and Steve Napolitano. The primary resulted in a runoff that Hahn won easily. Napolitano later was elected to the Manhattan Beach City Council.

The sign theft at the corner of 24th and Walker streets in San Pedro was captured on a grainy surveillance video that was widely shared at the time on social media.

The video shows a woman driving a white Prius and parking at the curb near the corner. Wearing a patterned dress and pink sweater, she gets out of the car and walks along the sidewalk, walking by a Napolitano sign in a landscaped parking strip near the curb while she glances in both directions around her.

She pauses briefly alongside an outside perimeter wall and then turns around, walks over to the sign, picks it up and puts it in the back seat of the Prius before driving away.

After a rare prosecution for such a crime, a jury in Long Beach returned a guilty verdict on the misdemeanor charge Thursday. She was placed on summary probation and ordered to complete 10 days of community service.

McDonald, 48, currently lists her employer on a Facebook page as a senior community advocate at the Los Angeles County Department of Public Health. She also lists being a casual for the International Longshore and Warehouse Union.

At the time of the theft, the video was widely shared on social media. When asked about it then, Hahn said “the woman” in the video did not work for her campaign.

McDonald, on her Linkedin account, lists working as campaign manager for Janice Hahn for L.A. County Supervisor from June 2015 through June 2016. She also was an aide to Hahn when she was a Los Angeles city councilwoman and was a field deputy for Hahn when she was in Congress.

In a CBSLA report from August, Napolitano’s campaign manager, Kevin Wen, said some 150 Napolitano signs had been taken during the campaign but he wouldn’t speculate on who the person was in the video.