Usage patterns
犯人を追うto pursue/chase the culprit
The police went into the mountains chasing the culprit.
犯人が逃げるthe culprit flees/escapes
The culprit fled the scene by car.
犯人が捕まるthe culprit gets caught
A week later, the culprit was finally caught.
犯人は〈人〉だと判明するit turns out that ... is the culprit
The investigation revealed that she was the culprit.