Interesting read by Jason Brennan.
In August 2017, Richard Hubbard III stopped at a red light in Euclid, Ohio, but his front bumper went a few feet past the white line. The cops pulled him over. That's no surprise: Police in Euclid, Cleveland Heights, and the surrounding cash-strapped towns strictly enforce traffic rules. But officers didn't just give the driver a ticket.
The police demanded Hubbard—a black man—step out of his vehicle. Dashcam footage shows that he calmly complied. Yet one officer immediately spun Hubbard around, bent his arm, and slammed him against his Hyundai. He flipped Hubbard again, punched him in the face, and kicked his groin. Hubbard screamed and put his arms up to protect himself. The other officer joined in.
They threw Hubbard to the ground but continued to punch, hammer, and kick him. When he tried to protect his face, they chanted the informal motto of American police, "Stop resisting!" Even when Hubbard was subdued, prostrate with his hands behind his back and two large officers pinning him down, one officer continued to pummel his skull.
Imagine you witness the whole thing. A thought occurs to you: You're armed. You could shoot the officers, perhaps saving Hubbard's life or preventing him from being maimed and disabled. May you do so?
Below, I defend a controversial answer: Yes, you may. Shooting the cops in this case is dangerous—they may send a SWAT team to kill you—and in many places it's illegal. But it is nevertheless morally permissible, indeed heroic and admirable. You have the right to defend yourself and others from state injustice, even when government agents act ex officio and follow the law.
Another by Brennan on this topic: When the state is unjust, citizens may use justifiable violence