For detectives, the most troublesome cases are those where the killer commits random murder.
If it's a crime by someone known to the victim, or a premeditated targeting, no matter how secretly the killer acts, as long as we investigate the victim's social relationships we can find some clues.
What worries them is when the killer had no prior acquaintance with the victim and decided to murder on a whim upon meeting them. This type of case is without leads and undoubtedly increases the difficulty of solving it.
Therefore, after Zhang Fan's analysis, everyone felt a bit heavy-hearted, except for Wang Lei who nonchalantly said, "I don't think this is a random act. If it were a random act, why would the killer take away the victim's clothes and belongings? The killer did this to conceal the victim's identity, so I think the killer definitely knew the victim."
"That's true. If they didn't know each other, why be so cautious?"
