The really really short version:
R44 ... outboard section of one blade delaminated and failed
Settled almost straight down through forest canopy ... evidence of low rotor rpm
Pilot found in his seat
Passenger about 200 feet away ... indicates initial survival
ELT was disarmed preventing early rescue.
Robinson's tap the blade musical not performed very often
HTML link
Air transportation safety investigation report A19Q0109 - Transportation Safety Board of Canada (tsb.gc.ca)