This is worth getting right.....being exhaustive.
We don't even know the message of what is written on the magazine parts!! Was this evidence destroyed for having no evidentiary value, was this magazine and parts retained in the evidence files for 50+ years? Looks like these prints were used to rule out Webber, possibly others.
I have to agree with the torn magazine angle. My thinking is that he tore this out, made notes stuffed the notes back in the magazine. When he was leaving for the jump he took the magazine because of prints with him, but the notes fell out into the seat back. Somewhere there is a unicorn of an inflight magazine missing parts that match up with the evidence.
We need to stay on this..