The real-life murder cases are different from what's shown in TV dramas.
Crime scenes are often much bloodier, bloody enough to make an average person vomit at first glance, or even faint upon seeing a pool of blood.
Moreover, unlike dramas where the culprit is cunning and plans the murder for three or even ten years, in reality, premeditated murders are rare; most are crimes of passion.
In reality, it's often a moment of conflict leading to violence.
Thus, after many murder incidents, the perpetrator can be identified almost immediately.
After that, it's about making arrests, or sometimes the suspect might turn themselves in.
The case in the Water District is a typical example of a passionate murder.
The crime scene was at the victim's home, where a conflict broke out between the murderer and the victim.
