Peters said that the next day Fan came to Loker around 11 a.m. to ask about her meeting with Wu.

"He started threatening me and saying that he wanted the perfume or money for it," Peters said. "Then he said that he would follow me to my home, and would not leave me alone."

David J.H. Blackburn, a student in the Graduate School of Arts and Sciences, came into the dining area and saw the exchange.

"I walked in and there was this guy yelling something about $45 at the manager," Blackburn said. "She said she was going to call the police and went into her office. He went over and shoved her and hit her in the head. She started to scream so I jumped over the counter and grabbed him."

Blackburn and another patron then took Fan out of the office while Peters called the Harvard University Police Department (HUPD).

"[Fan] waited around while she was calling the police, all the while saying 'you'll pay if you don't give me that $45,'" Blackburn said.

Peters also said that Fan later called her office while HUPD officers were still in Loker.