Thread:Paul.rea/@comment-5833545-20140302150032/@comment-4091815-20140302153111

All we know is there.

She can hear those Banshee whispers - they tell her things about death and dying.

The scream allows her to focus her hearing.

In 3(a) she was subconsciously following those voices and ended up at the murder scenes.

That's everything we know from the show itself. Jeff Davis has added a bit about who is doing the whispering but all of that is already on the page.