Unknown at this stage awaiting report from local Police.
https://www.20min.ch/.../schweizer-basejumper-33-stirbt...

Update 9th December 2024
Written by a close personal friend

There were no witnesses to Johnny 's incident and from what I know there was no video, or at least none was found.
It was noted by the rescue team that the injuries reported showed a high-speed impact.
Considering the point where the body was found, we can assume that he made a proximity flight line that was too close to the limit, and impacted a ledge, as he hasn't been able to fly past it.
As far as I remember Jonny was flying a Sausage but He wasn't very good at flying even if he was improving, the problem is that sometimes his suit would become highly unstable with significant rolling and pitching movements.
In a proximity line with a single piece unfortunately there is no margin, the flight must be clean, if you lose control, even a little, the lateral movements and the resulting loss of altitude, become a key factor that if not calculated can lead to disastrous results.
Unfortunately this is the most we can know based on the data collected.
What is certain is that Jonny was pushing a lot in the last period before the accident, even though in my opinion he had not yet developed the right skills, and honestly it had been pointed out to him on more than one occasion.
Things then went in the worst possible way, and as always in this activity everyone makes his own choices.

I want to add that Jhonny was a very nice guy, with thirst for adventure and genuinely stoked on life. He will be missed!