Only if that caused him to die. If his heart gave out as he was in excited delirium, then it’s not the officer that killed him no matter how bad his actions were.
I don’t see the prosecution have put that entirely to bed, given they have had to call in extra people to discount the conclusions of the original doctor. The problem of ambiguity in the medical evidence has little to do with your distaste at his choice of force.
I’m intrigued with this one as i would be very uneasy of a conviction if this was in the local crown court any given week.