Robert C. Koehler: Why did you kill my brother?

For Derek Chauvin, nine minutes and twenty-nine seconds have turned into twenty-two and a half years — the prison sentence he recently received for the murder of George Floyd.

Chauvin famously knelt on George Floyd’s neck last year, as he lay handcuffed and helpless, for those nine-plus minutes, while three colleagues stood by, indifferent to the murder so obviously underway . . . police administering the death sentence to a man accused of trying to use a counterfeit $20 bill at a nearby convenience store. Unfortunately for the smirking Chauvin, his crime was caught on cellphone video and shocked