Three police officers in the US city of Chicago have been indicted over the fatal shooting of Laquan McDonald in the latest legal action over excessive force against black men in the country.

But securing a conviction, even when the killing is caught on camera, is notoriously difficult.

In a series of recent court rulings, police accused of shooting dead black men have escaped prosecution.

Al Jazeera's John Hendren reports from Chicago.

US & Canada, United States, Politics