"Director Zheng, actually I've read a lot of books on criminal psychology before. Based on the killer's various behaviors, his ultimate goal in killing is to provoke and humiliate the police."
"So we can basically rule out any connection between him and the three victims... The first two victims we can still explain as random acts, but the third victim, Zheng Bei, was definitely not random."
"The killer definitely knew Zheng Bei's identity, and he was able to strike accurately on the way home from work, which shows a deep understanding of either Zheng Bei or the police movements at the time. This is difficult for an outsider to manage, so I suspect he might be someone from within the police force!"
"Moreover, the surveillance around the scene left no trace of him, which also suggests he is very familiar with the terrain around Yongjiang Bridge and Yongjiang Square, consciously avoiding all surveillance cameras during the crime."
