Wow, talk about getting massively defensive over someone else's opinion that differs from yours. I've seen the incident and read many different views all over the world.
1st Opinion: People are saying he should be locked up for murder. That means they believe he intended to kill him which is absolute bollocks.
2nd opinion: Why do you think that? If my mate was killed and I thought someone had done it out of negligence and tried to hurt him I'd be coming out and saying so. Or just saying nothing as opposed to coming out and defending him. As you say they'd have been advised not to say anything, but they have actually jumped to Petgraves defence.
As a Hockey fan you'll know that when players are skating at speed and lose balance and fall forward your skates can go up in the air won't you? Which is what it looked like to me. Like I said this has happened before, although the lad didn't die.
We can revisit this when he's found not guilty in a court of law. Which I'm confident will happen.