Prof. Anne-Marie Brady, a China specialist at the University of Canterbury in Christchurch, New Zealand, said her home was burglarized in February while she and her family were out. The thief or thieves ignored a glass jar of cash and other valuables, she said, in favor of an “old, broken” laptop, on which she had conducted her most recent research, and a “cheap” cellphone the professor had used on travels to China. Analysts said there was strong circumstantial evidence that agents of Beijing were responsible. Peter Mattis, a former C.I.A. analyst and now a China Program fellow at the Jamestown Foundation, said the burglary, along with previous break-ins at her office, meant there was “only one likely culprit for this,” referring to China. Ms. Brady’s high profile on matters of China’s influence worldwide meant “intimidating her into silence would in a sense be a major win” for the country, he said.