"I Can't Breathe"

Did George Floyd say "I can't breathe" before pinned to the ground by Officer Chauvin's knee? And why would it matter?

Derek Chauvin's bodycam footage shown for first time at George Floyd trial
The Telegraph
1 year ago
https://www.youtube.com/watch?v=Apuhj_G90QQ

hennepin county medical examiner's office autopsy report
Jun 1, 2020
In accordance with HCME policy, this report was reviewed by another board-certified forensic pathologist prior to release.
https://www.hennepin.us/-/media/hennepinus/residents/public-safety/medical-examiner/floyd-autopsy-6-3-20.pdf