http://www.dailykos.com/story/2014/12/16/1352210/-How-Sandy-McElroy-and-Prosecutor-Bob-McCulloch-colluded-to-destroy-the-case-against-Darren-Wilson
"Sandy McElroy was never near Canfield Drive on August 9. She completely fabricated her entire story weeks after Darren Wilson killed Mike Brown. During their interrogation of her, Sandy McElroy was completely shredded by the FBI as a racist, a liar, unstable, and more. They proved in their own interview, with evidence, that McElroy lied about ever being there, about how she left the scene, about key details of the case that she claimed she witnessed, and more.
Furthermore, Sandy McElroy, beyond being a convicted felon, had a record in St. Louis of interfering with investigations and making preposterous claims about connections she had to cold cases. All of this was known to St. Louis officials. Her extreme racism was not private, but public, and was discussed at great length with the FBI before she was ever allowed to testify before the grand jury."