From that clue, they separated into to two teams. One would go to check the CCTV. There should be CCTV's where the room that had access to those drugs. A normal person would never have the access for the room unless the hospital's staff itself.
And also there was a CCTV in the wad where the patient was staying. It might capture the person that administered the drugs into the patient's body.
However, the clues ended. On that day, the CCTV at the drug's room was broken. As for the CCTV in the wad captured nothing indifferent about the patient.
As for another team, they investigated the drug's room itself. They found out that amount of the drugs stored in the drug's room did not match the written amount in the document.
Meaning someone had been stealing it. The missing amount of the drug matched the amount found in the patient body. Even though they found this information but it still did not help in clearing Yu Qi's name.
...
Daily Mini Scene
Aoi: Pity that you can not come out from here.
Bo Ya: Yeah.
Aoi: I want to hang out together with you and our master. We can eat around.
Bo Ya: I want to go outside too.
Aoi: Last night, we eat the food that man, Qin Xia cook. It was okay.
Bo Ya: What? You went to eat with him.
Aoi: Yeah. It is not bad.
Long Hui: Oh, tell me more about it. 눈_눈
Bo Ya:.... (゜ロ゜)
Aoi:.... �(゚□゚*川
Long Hui: Come. We can have a long chat about that. ಠ_ಠ
Aoi: 'Help me.' (;人;)
Bo Ya: 'I will go and pray about everything.' ᕕ(╯°□°)ᕗ
Aoi: 'You Betrayer!!!' ヽ(`Д´)ノ
....
ZerahNeko