U.S. alleges California woman spied on Taiwan president's son for China

Prosecutors allege Wanying Zhang, 34, of Irvine, surveilled Taiwanese President William Lai Ching-te's son Lai Ting-yu and his family at the direction of Chinese officials. She is charged with acting as an unregistered foreign agent, meaning working for Beijing without disclosure. Relatives outside security perimeters can offer leverage, which worries counterintelligence.