Ah, so because someone has a past history for which they've served their time it's ok to murder them? Is that the logic you're going for? I hope not as it's a fairly lame excuse. The police still don't have a mandate to murder, even in the USA. Your argument falls at the first hurdle, but I don't really understand why you're even attempting to defend the actions of the police involved in this incident.
The All Lives Matter is mantra is just white whining and whining from a position of privilege brought about by nothing more significant than skin colour. Aren't you fortunate to be able to do that without being persecuted for it, let alone having a knee pressing down on your neck. Waaa waaa waaa, what poor oppressed middle aged white guys we are. We have it so bad in this world.
White privilege is very real. It's sometimes obvious, it's sometimes subtle. But it's always there. If you can't see it or appreciate that then perhaps you enable it.
It's not enough to be non-racist, it's time we were all actively anti-racist - and a handful of replies on this thread are anything but.