Also trained in judo for many years. But I'm pretty sure you won't injure multiple areas in one "grappling" incident and if you break a rib, you would normally sit out the rest of the day.

When you're training injury does happen but not in more than one area of your body unless you were literally being beaten to a pulp.

So yes, I'm 100% sure it was a malicious intent if they're claiming that he died during "bicycle training" which oddly included grappling.