Use the word culprit in a pragragh

The policemen arrived to the scene of the incident, but saw the culprit had already fled.

Culprit means someone who has committed a crime

It was a lovely Sunday morning as the police arrived to the crime scene where a woman was murdered in her home, the suspects shivered in fear. The three suspects were the neighbor, the mailman, or the husband. The neighbor said he was pruning his flowers, the mailman said he was delivering mail, and the husband was getting groceries. The police immediately found the culprit, who was the mailman since there is no post on sundays.