There’s a world of difference between one-off murders which involve one ethnic background member of the public attacking another - Nowak, Stephen Lawrence - and George Floyd being murdered by a serving police officer.
That’s plain and obvious.
With Stephen Lawrence and to a lesser extent with Nowak, there are significant concerns with the police response. On the latter, the police got it wrong at the time. It’s been acknowledged and processes will change as a result. Senior officers have got into a mindset of arrest first for targets/KPIs then establish facts. It has to be a watershed for police to be de-politicised from both left and right.
Stephen Lawrence was different in the sense there was a non-investigation and extensive corruption, as well as the ineptitude also seen in the Rachel Nickell, Daniel Morgan and other dreadful investigations.