Talk:What's to Discuss, Old Friend?/@comment-86.29.233.190-20111216165642

I'd like to know more about the threatening letter Bree got in the mail that was the same note that Mary Alice recieved, it hasn'tbeen brought up in a while and I want to know who sent it. It couldn't have been Martha, so who's next most likely to have sent it, and more importantly, how do they know about the murder?