Yоu аre prоviding cаre tо аn injured Law Enforcement Officer with a GSW to the right upper chest at the scene of a tactical operation. The LEO presents with severe respiratory distress, diminished breath sounds on the right side, and distended neck veins. You notice tracheal deviation away from the affected side. The LEO's blood pressure is dropping rapidly, and their condition is deteriorating. What is the LEO's field diagnosis and your immediate treatment?