In Haiti, gangs take control as democracy withers

Jimmy Cherizier zips through Haiti’s capital on the back of a motorcycle, flanked by young men wielding black and leopard print masks and automatic weapons.

As the pack of bikes flies by graffiti reading “Mafia boss” in Creole, street vendors selling vegetables, meats and old clothes on the curb cast their eyes to the ground or peer curiously.

Cherizier, best known by his childhood nickname Barbecue, has become the most recognized name in Haiti.

And here in his territory, enveloped by the tin-roofed homes and bustling streets of the informal...