Jack Cashill finds the details in witness #40’s account, too similar to the details we exposed here (that no-one knew) to be sheer coincidence.  Hence, the reasoning for the journal entry of Witness #40 placed in the evidence document data.
♦ Witness #40 is in Grand Jury Vol #15 (pg 46) Click Here 
♦ Witness #40 Journal Is available HERE
Initially I thought it was highly unlikely.  However, now, notsomuch….

(Via American Thinker) Easily the strangest of all the documents that have emerged from the Darren Wilson grand jury is the one attributed to Witness 40. These are the pages pulled from her — I assume her based on writing style — diary entries from the day Michael Brown was shot, August 9, 2014. She does not appear to have been interviewed.
On the face of things, Witness 40 fully corroborates the testimony of Officer Wilson. I leave the grammar uncorrected. “The cop was wobbling,” she wrote from her anxious perch in a silver Pontiac stopped behind Wilson’s car, “the big kid turned and had his arms out with attitude. The cop just stood there dang if that kid didn’t start running right at the cop like a football player, head down.”
Her take on the final scenario matches not only Wilson’s description, but also the autopsy findings. “I heard cop say something but not sure what or if he was just making noise,” she continued. “Cop took a couple steps forward then backwards then the gun went off 2 more times. The last one on the top of the kids head. Omg the blood.”
To dissect testimony like Witness 40’s, fourteenth-century philosopher William of Occam had a useful rule of thumb. We know it as Occam’s Razor, and it is often stated thusly: “The simplest explanation is usually the best.” The original Latin –“Pluralitas non est ponenda sine necessitate” — adds a wrinkle. This translates roughly, “Multiple variables are not to be posited without necessity.”
The simplest explanation is that the Witness 40 diary entry is authentic. It is hard to believe that prosecutors from the State of Missouri and the Department of Justice would allow a fraudulent document into the official record of a case so thoroughly scrutinized. Even if they wanted Wilson to walk, they did not need a document this suspect. They already had sworn testimony from at least half-a-dozen African American witnesses on the scene.
However, (read more)