Ho Yin Mo, of Hong Kong, entered the U.S. lawfully in 2020 but “overstayed his welcome” by failing to leave the country, the Department of Homeland Security said in a statement.

U.S. Immigrations and Customs Enforcement agents detained a California state employee working as a field representative for Assemblymember Catherine Stefani, D-San Francisco, on Thursday as he traveled through Harry Reid International Airport in Las Vegas.