I mourne your loss. I know what it is like to roll one of these and almost coming out. One more roll and a passanger and I would have either been dead or seriously hurt.
Watching videos on youtube and seeing what people do in these it is no wonder why they get hurt. I have been contacted by an attorney on mine only to let him know it was my own fault. I had read the manual and all the warnings and it still rolled from my own stupidity. I know that not all incidents are human caused but in the event of a roll-over it is usually speed or angle that caused it. We are not engineers but it was easy to understand why I rolled and others have also. I do not blame the manufactures, we take risks every minute of every day.
I wanted to state my opinion and do not take it negatively. I have had a duaghter in a atv injury before.