What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
The victim exited the aircraft at 10, 000 ft above ground level (AGL), along with another skydiver. Both skydivers were in free fall until approximately 4,000 feet AGL, where they tracked apart for separation. The victim deployed his main parachute and immediately after deployment started to spin. The victim's suspension lines were twisted approximately 3 or 4 turns. The victim attempted to untwist the lines but was unsuccessful. The victim did not appear to jettison the main parachute prior to deploying the reserve parachute. Examination of the main canopy release system appeared to operate properly, when the parachute was examined after the accident, and the canopy release was still stowed on the right harness, as it normally would be. The victim deployed his reserve parachute at approximately 800 feet AGL. Due to the main parachute being deployed, the reserve parachute pulled free of the pack, the pilot chute deployed and pulled the free bag out of the pack, but did not un-stow all of the lines or fully deploy the reserve parachute. The victim struck the ground, causing fatal injuries. The aircraft itself was not related to the incident.
As the FAA filed it
THE VICTIM EXITED THE AIRCRAFT AT 10, 000 FT ABOVE GROUND LEVEL (AGL), ALONG WITH ANOTHER SKYDIVER. BOTH SKYDIVERS WERE IN FREE FALL UNTIL APPROXIMATELY 4,000 FEET AGL, WHERE THEY TRACKED APART FOR SEPARATION. THE VICTIM DEPLOYED HIS MAIN PARACHUTE AND IMMEDIATELY AFTER DEPLOYMENT STARTED TO SPIN. THE VICTIM'S SUSPENSION LINES WERE TWISTED APPROXIMATELY 3 OR 4 TURNS. THE VICTIM ATTEMPTED TO UNTWIST THE LINES BUT WAS UNSUCCESSFUL. THE VICTIM DID NOT APPEAR TO JETTISON THE MAIN PARACHUTE PRIOR TO DEPLOYING THE RESERVE PARACHUTE. EXAMINATION OF THE MAIN CANOPY RELEASE SYSTEM APPEARED TO OPERATE PROPERLY, WHEN THE PARACHUTE WAS EXAMINED AFTER THE ACCIDENT, AND THE CANOPY RELEASE WAS STILL STOWED ON THE RIGHT HARNESS, AS IT NORMALLY WOULD BE. THE VICTIM DEPLOYED HIS RESERVE PARACHUTE AT APPROXIMATELY 800 FEET AGL. DUE TO THE MAIN PARACHUTE BEING DEPLOYED, THE RESERVE PARACHUTE PULLED FREE OF THE PACK, THE PILOT CHUTE DEPLOYED AND PULLED THE FREE BAG OUT OF THE PACK, BUT DID NOT UN-STOW ALL OF THE LINES OR FULLY DEPLOY THE RESERVE PARACHUTE. THE VICTIM STRUCK THE GROUND, CAUSING FATAL INJURIES. THE AIRCRAFT ITSELF WAS NOT RELATED TO THE INCIDENT.