After Ivy Miller entered the security room, she asked someone to check the surveillance cameras. Although there weren't any cameras inside the office,
there was one at the entrance. Employees started entering the office at 7:15 this morning.
And during this period, no one left.
This means the file must still be in the office; she just didn't know whose hands it was in.
She thought carefully, and the only person who could possibly be against her like this was Supervisor Liu.
However, coincidentally, Supervisor Liu was not the first person to enter the office.
She wouldn't dare blatantly steal the file in front of others.
After returning to the office, she walked to the desk of the first employee who entered: "Hello, I went to the surveillance room, and today you were the first to come to the office to work.
After you arrived, did you see anyone lingering around my desk?"
The female employee shook her head firmly: "I didn't notice; I went out shortly after I came in."
