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A routine trip through one of America’s busiest airports ended with federal agents taking a California government employee into custody during a targeted immigration enforcement operation.
The arrest quickly drew the attention of elected officials in San Francisco, while the Department of Homeland Security offered a straightforward explanation for why the traveler was allegedly subject to removal proceedings.
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Ho-Yin Mo, a field representative for Democratic California Assemblywoman Catherine Stefani, was arrested by federal immigration authorities at Harry Reid International Airport in Las Vegas on September 17.
Mo, a Hong Kong native and former San Francisco television journalist, remained in custody this week at the Nevada Southern Detention Center in Pahrump, according to published reports.
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DHS said Mo entered the United States legally on January 13, 2020, under temporary authorization but failed to leave the country when that authorization expired on May 15, 2020.
“Mo lawfully entered the U.S. on a temporary basis but illegally overstayed his welcome,” a DHS spokesperson said in a statement following the airport operation.
The department said Mo was apprehended during a targeted operation and disputed suggestions that his authorization to work for the California Legislature established lawful immigration status.
“Work authorization or a pending application do NOT confer legal status in the United States,” DHS said.
Authorities have not announced a criminal charge against Mo, who is expected to remain in federal custody while his immigration case and possible removal from the country proceed.
Stefani responded by calling for her employee’s immediate release and describing him as both legally employed by the California Legislature and an important public servant for her district.
“My message today is simple: I am respectfully calling for Ho Yin Mo’s release as soon as possible,” the Democratic assemblywoman said.
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News anchor turned California Democrat busted in ICE operation https://t.co/4c28iCw81q pic.twitter.com/jnEf2SPDxB
— New York Post (@nypost) September 22, 2026
Stefani said Mo assists constituents with obtaining health care coverage, child care and food assistance while serving as an important connection between her office and the district’s Chinese-American communities.
“Our whole community eagerly awaits Ho Yin’s return to his home and his job where he is loved and adored,” Stefani said.
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First Assistant U.S. Attorney Bill Essayli of California’s Central District defended the enforcement action, writing on social media that “no one is above the law, not even the California legislature and its staff.”
Mo joined Stefani’s district office in January 2025 after working as an Asian American and Pacific Islander outreach organizer during former San Francisco Mayor London Breed’s unsuccessful 2024 reelection campaign.
Before entering politics, Mo worked as an anchor and reporter at KTSF Channel 26, a Chinese-language television station serving the San Francisco Bay Area, where he became recognizable among Chinese-speaking viewers.
Stefani represents California’s 19th Assembly District, covering western San Francisco and northern San Mateo County, after previously serving on the San Francisco Board of Supervisors from 2018 through 2024.
DHS connected the arrest to the Trump administration’s broader change in airport enforcement, which permits immigration authorities to target travelers believed to be in the country without lawful status.
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The department said the administration had reversed previous policies that allowed such travelers to take domestic flights and would no longer permit those without legal status to fly unless they were departing the United States.
“This administration is working diligently to ensure that aliens in our country illegally can no longer fly unless it is out of our country to self-deport,” DHS said.
Stefani maintained that Mo was legally authorized to perform his job, while DHS emphasized that permission to work does not necessarily provide or extend lawful immigration status.
The dispute will ultimately turn on Mo’s immigration records and any pending applications or claims he presents during the removal process, rather than his employment with an elected California official, The NY Post reported.
For now, the former television anchor remains in federal custody as Stefani and other San Francisco officials press the Trump administration to release him and immigration authorities move forward with their case.
This article may contain commentary which reflects the author’s opinion.
