Woman beaten to death in Brazil due to fake Facebook post (www1.folha.uol.com.br)

This is tragic. I think this comment from the offending Facebook group page sums it up best (translation courtesy of Google):

Shame on you. Without any evidence accuse a woman of something. No right to a fair trial, leaving it at the mercy of the "law into their own hands."

you are as guilty as those who attacked and killed.