Well, one possible motive could be revenge. Maybe the guy has some sort of grudge against the man he trapped. Another could be that he's trying to gain something, like information or valuables. For example, if the man trapped has some secret knowledge, the trapper might be trying to force it out of him.
It could be that the guy trapping the man is just plain crazy. He might not have a rational motive at all. He could be acting on some delusion or impulse that makes him think trapping the man behind the wall is a good idea. Maybe he heard voices in his head telling him to do it.
Perhaps it's a matter of self - defense in the guy's mind. He might feel threatened by the man he trapped and thinks that this is the only way to keep himself safe. But his sense of self - defense is extreme and unethical. He may have misinterpreted the man's actions as more dangerous than they actually were.
Chapter 383, "Doomsday Beehive", is the clearest early answer because it turns Shao Changqing's situation into a concrete plot event. The chapter turns that into something concrete by moving from Jiang Li's pale fingertips rubbed against the handle of the coffee...
Chapter 520, "Was Zheng Xun Replaced?!", is the clearest early answer because it turns Gu Yu's situation into a concrete plot event.
Chapter 469, "He Must Not Tolerate This Calamity", is the clearest early answer because it turns Shang Shuyue's situation into a concrete plot event.
Chapter 396, "The Shang Family Now Follows My Orders", is the clearest early answer because it turns Director Shang's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Doomsday Beehive" featured a male supporting character who was...
Chapter 666, "It Really is His Mom!", is the clearest early answer because it turns Wen Feifei's situation into a concrete plot event. A useful checkpoint is the way the scene starts with The crowd was shocked as they turned their attention to the unknown,...
Chapter 497, "Carefully Raised a White-eyed Wolf", is the clearest early answer because it turns Team's situation into a concrete plot event. The chapter turns that into something concrete by moving from The setting sun packed up its last rays and tossed them into the...
Chapter 505, ""Postpartum Care for Sows", is the clearest early answer because it turns Shen Ruobing's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Zhao Lang laughed, but his eyes became considerably clearer, "Is...
Chapter 389, "Slaughter Pig Platter", is the clearest early answer because it turns Xu Huiqiu's situation into a concrete plot event.
Chapter 390, "Is Jiang Li Commended by the Police Again?!", is the clearest early answer because it turns Is Jiang Li's situation into a concrete plot event. It opens with The bell rang for school to let out, and Tao Ying hurriedly grabbed...