Or they should put them a cage put kerosene in there hair and light it on fire ...

I saw it when happened here in Brazil, in the city of Rio.
Indeed, the girls also were homeless (as the burned guy).
Even where the police found (after they were arrested), they were doing a vengeance against the guy who had abused one of them previously.
(sorry for my poor english)

Nice to know they were caught.

it helps put it in context if their are details

karma in action

just testing his fire blanket