Lu Chuan had already thoroughly inspected the office door lock.
Verified that there were no signs of forced entry.
There were a total of 7 keys to this office; Director Chen and four doctors each had one, and another key was inside Director Chen's office.
Additionally, the hospital's Public Security and Protection Department also had a spare key.
However, this was the current number of keys, since there had been staff transfers among the healthcare doctors, and others had keys which were returned and never redistributed—this can't be verified now.
Zhang Hui had already interviewed the healthcare doctors and conducted a detailed investigation.
So far, there was no evidence of any of the five people betraying for personal gain.
The doctors and Director Chen left separately, and Lu Chuan started pacing in the office.
The office wasn't big, just under a hundred square meters.
Upon entering, there was a filing cabinet on the left and an office area on the right.
