[Editor's note, April 23, 2019: Rebecca Parker Mankey has since been found safe and is no longer considered a missing person. Read more here.]

Rebecca Parker Mankey, the woman who confronted a 74-year-old man who was wearing a "Make America Great Again" hat inside of a Palo Alto Starbucks, has been reported as missing by authorities.

According to the Lake County Sheriff's Office, Mankey did not return to her Palo Alto home after a trip to Lake County, and is believed to be in Aberdeen, Washington.

The Aberdeen Police Department is assisting the Lake County Sheriff's Office in attempting to locate Mankey, whose cell phone information activity placed her near Aberdeen around 9:00 a.m. on Friday.

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Melissa Demyan, a friend of Mankey's, wrote on Facebook Friday that it has been over 24 hours since anyone has heard from her.

"My friend Parker is missing," she wrote. "It's been over 24 hours since anyone has seen or heard from her. I last saw her when she was leaving Lake County to head home yesterday.... Parker if you're reading this: we love you so so much and we just want to know you're safe. Please let us know you're okay!"

Mankey received national media attention when she berated a man inside of a Palo Alto Starbucks for wearing a MAGA hat, and wrote in Facebook post that she "called the entire Starbucks to order and yelled at him."

"He will never forget me and will think seriously about wearing that hat in my town ever again," she wrote. "If you see him in this hat, please confront him. You do not want to be the person who didn't speak up as we slipped into fascism."

She ended up losing her job at a nearby music store because of the incident, and has since received a number of threats online.

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Mankey was also a co-chair of the Bayshore Progressive Democrats, a self-described group of "Berniecrats for the political revolution in the region around Palo Alto, Mountain View, and Sunnyvale."

After the incident, the group wrote on Facebook that Mankey had resigned, and her family was receiving death threats and "other threats of injury and harm."

"As a result of publicity surrounding her actions, today she and her family members were doxxed (had personal contact revealed to encourage threats and harassment) on right-wing social media and internet channels," they wrote. "She and her family have received multiple death threats and other threats of injury and harm, and is losing her employment."

The group also wrote that Mankey's actions "did not follow these principles and do not reflect our organization's political philosophy and approach."

Mankey is driving a 2010 black Honda Accord with license plate 8INB004. Anyone with information on her whereabouts in encouraged to call (707) 263-2690.

Eric Ting is an SFGATE staff writer. Email him at eric.ting@sfgate.com and follow him on Twitter

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