The rank insignia of Reef Island police chief L. Thompson is confused and contradictory. Her shirt's left epaulet has four stars, the right epaulet has three (with a gap for a fourth), and both sleeves have a sergeant's chevrons.
The police arrive at the island estate in a helicopter as Cat is fleeing on foot. They saw her running towards the dock, yet most of the officers go the other way towards the house. A couple of officers go to the dock and see Cat going away in a boat. Since they had a helicopter, which is faster than a boat, they could have easily overtaken her and radioed for a police boat to intercept her.