"In America, we don't do kings," the No Kings website reads. "They've defied our courts, deported Americans, disappeared people off the streets, attacked our civil rights, and slashed our services. The corruption has gone too. far. [cq] No thrones. No crowns. No kings."

In a city notorious for unruly crowds at large sporting events, protesters were peaceful and law-abiding — as were the police.

Detectives don’t yet know why the alleged rifleman pulled out a weapon or ran from the peacekeepers, but they charged him with murder and accused him of creating the dangerous situation that led to A...