After He Feng's explanation, Fang Ya and Shao Xiang had some understanding of Wu Wei's current situation.
Wu Wei's drug abuse was not something that could have happened in a day or two.
The person who led Wu Wei to take drugs had yet to be found.
Fang Ya was very certain that it was not that she had yet to find it out. This person was definitely Tang Fu.
On the day of the murder, no one had poured drugs or anything like that into Wu Wei's mouth.
On the way here, Wu Wei's addiction had simply kicked in, so he found a place to take drugs.
This place was the crime scene.
Wu Wei was in a daze, so he did not see who the murderer was, nor did he know that a murder had happened at the scene.
This was also why Wu Wei was found at the scene and even lost his wallet, but he could not explain what had happened.