Irish singer Sinead O'Connor vanished from Facebook on Thursday after a string of disturbing postings and her brief physical disappearance in the Chicago suburbs raised alarm. It was unclear whether she left or was removed from Facebook, but the social media site last year temporarily deactivated her account after she suggested she had tried to overdose. Fears for O'Connor’s well-being returned this week when police in the Chicago suburb of Wilmette said that they were looking for her after she failed to return from a bicycle ride.
