Mine too. It's a terrible tragedy.

Although this does not indicate the cause to be tied with the skydiving, it probably was and I would wager fuel starvation. Just speculating, but since it is desirable to carry only enough fuel for a single, 40 minute jumping run, refueling is a fussy business. At my operation we add just enough fuel to do a single run, 9 or 14 gallons depending on height of jump, plus a 30 minute reserve. It does happen in many thousands of missions in the country a weary pilot will takeoff without remembering to fuel up as the task can be repeated so many times in a day, not catch it before becoming airborne, not have fuel in reserve to return to the airport, plus have no place to put down on soft ground. That's a lot of if's, but it happens.

A smart, experienced skydiver will look up and check the wing gages even if they trust the pilot.

I do not have the list of facts with me but I occasionally research accident rates for skydiving and they are low as a sport. Fuel starvation and entanglement with the aircraft are the biggest causes, followed by parachute failure, but accidents are surprisingly rare. Maybe ten deaths per year. This across hundreds of skydiving outfits performing thousands of runs per year apiece. It is not a dangerous sport; the old adage driving is more dangerous than flying still applies.

I hope you will do some research to satisfy yourself of this and reconsider coming for a tandem jump on your next anniversary. It really is a great activity. Gather more information to allay your fears.

I saw this tag painted on the tail of an airplane yesterday if memory serves:
"By avoiding risks we may not lose our life but we shall accept risks so we shall not lose life itself."