1. The police have professional skills and experience, and can quickly identify criminal acts, collect evidence and track down criminal suspects.
2. The suspect may have committed a crime, left material evidence or been photographed by the surveillance camera, which will help the police catch the suspect.
There are many people in society who support and assist the police, such as providing clues or witnesses, which also helps the police catch suspects.
4. The suspect may fail to escape after committing the crime and be captured by the police during the escape.