Derek Chauvin was wrong and deserves his punishment.
That said, George Floyd was accused of passing a counterfeit bill, which can be charged as a federal felony. That was the call the police responded to. Whether or not he was actually passing a counterfeit bill we may never know because all of that seemed to disappear with his death.
Personally, I don't think George Floyd should have been the hero of the BLM movement. Yes, Chauvin needed to be charged as what he did was wrong, but the case that truly deserved the attention was Breonna Taylor.