Actually, Xu Fan could hack into the surveillance system directly because he was the one who created it.
However, to show respect to Yang Yu, Xu Fan still asked Yang Yu for the password to access the surveillance.
Xu Fan quickly reviewed the surveillance footage from midnight that night and saw a suspicious figure.
But the person had their face covered with a black hood, so it was impossible to see their appearance, only knowing it was a woman.
There were some private areas in the laboratory without surveillance; after she left Shi Yiyang's office, it was unknown which corner she hid in.
And at the front entrance, no one was found to have left the research institute during that time.
"How could this be?" Xu Fan frowned, "There's no way I made a mistake!"
Shi Yiyang was also worried; if the insider wasn't found soon, all her future research results would no longer remain confidential.