Police: Beating on video began after friendly encounter

CHICAGO (AP) — The two 18-year-old men had been schoolmates, police say. After meeting at McDonald’s, they spent two days together, driving around visiting friends. Then a pretend fight escalated into a brutal beating of one of the men, a mentally disabled teenager, in an attack that stirred racial tensions and outrage after being broadcast on Facebook Live.
How the white suburban teen ended up beaten by four black people, threatened with a knife and taunted with profanities against