What was found
AT APPROXIMATELY 2130 CST, ACFT IN DESCENT, PIC HEARD A LOUD "POP" FROM THE COPILOT WINDSHIELD. UPON VISUAL INSPECTION, PIC NOTICED COPILOT WINDOW PANE CRACKED AND SHATTERED. PILOT REQUESTED "PRIORITY HANDLING" WITH ATC FOR ARRIVAL AND WAS INFORMED HE WOULD BE NR 6. DUE TO FACTORS SUCH AS NIGHT FLIGHT, UNKNOWN DAMAGE TO COPILOT WINDSHIELD, AND THUNDERSTORMS AND RAIN MOVING IN TO THE AREA, PIC OPTED TO DECLARE AN "EMERGENCY" AND AGAIN REQUESTED PRIORITY HANDLING. ACFT LANDED UNEVENTFUL. POST FLIGHT INSPECTION REVEALED INNER PANE CRACKED AND NO OBVIOUS SIGNS OF FOREIGN IMPACT.