As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB OUT OF KFXE, R/H ENGINE OIL PRESSURE LIGHT ILLUMINATED AND OIL PRESSURE DROPPED TO ZERO. PILOT IMMEDIATELY SHUTDOWN ENGINE AND RETURNED TO HOMEBASE. AIRCRAFT RETURNED TO BASE LANDING 450 LBS OVER WEIGHT LIMITATIONS. POST FLIGHT INSPECTION REVEALED OIL STREAKS ON R/H ENGINE AND COWLING. TROUBLESHOOTING REVEALED CREW FROM PREVIOUS FLIGHT, AFTER SERVICING ENGINE OIL, DID NOT SECURE OIL CAP.