NBC Universal, Inc. Seeing the stories of Asian Americans being attacked in cities from San Francisco to New York hits close to home for two veteran Cambridge Police officers. "My mother's friend called her from California and warned my mother, Don't step out of the house,'" said Sgt. Buckowe Yam. "Where now it's putting fear in my mother here in Boston not even go out the supermarket." Download our mobile app for iOS or Android to get alerts for local breaking news and weather. "It's just shocking," said Det. Ken Mui. "It can happen to any of my family members."