In an unusual move, authorities released Late Monday night 24 volumes of material, covering 23 meetings that the grand jury held between August 20 and November 21.
Some of the notable findings CNN points out:
Wilson told the grand jury he had never fired his gun on duty before shooting Michael Brown.
Asked if he had ever used excessive force before, he replied: "I've never used my weapon before."
The area where Brown was shot was described as a "hostile environment."
"There's a lot of gangs that reside or associate with that area. There's a lot of violence in that area, there's a lot of gun activity, drug activity, it is just not a very well-liked community. That community doesn't like the police."
The plan was to arrest Brown.
"I knew I had already called for backup and I knew they were already in the area for the stealing that was originally reported. So I thought if I can buy 30 seconds of time, that was my original goal when I tried to get him to come to the car. If I could buy 30 seconds of time, someone else will be here, we can make the arrest, nothing happens, we are all good. And it didn't happen that way."
Wilson was afraid he would get beaten to death by Brown.
"I felt that another of those punches in my face could knock me out or worse ... I've already taken two to the face and I didn't think I would, the third one could be fatal if he hit me right," Wilson said.
Wilson fired 12 shots, Brown kept running through the shots.
"As he is coming towards me, I tell, keep telling him to get on the ground, he doesn't. I shoot a series of shots. I don't know how many I shot, I just know I shot it," he said.
"I know I missed a couple, I don't know how many, but I know I hit him at least once because I saw his body kind of jerk," he said.
"At this point I start backpedaling and again, I tell him get on the ground, get on the ground, he doesn't. I shoot another round of shots," he said.
"Again, I don't recall how many him every time. I know at least once because he flinched again. At this point it looked like he was almost bulking up to run through the shots, like it was making him mad that I'm shooting at him.
"And the face that he had was looking straight through me, like I wasn't even there, I wasn't even anything in his way."
He told the jurors he thought Brown was going to tackle him.
"Just coming straight at me like he was going to run right through me. And when he gets about that 8 to 10 feet away, I look down, I remember looking at my sites and firing, all I see is his head and that's what I shot.
Brown reached under his waistband.
"He turns, and when he looked at me, he made like a grunting, like aggravated sound and he starts, he turns and he's coming back towards me," Wilson said.
"His first step is coming towards me, he kind of does like a stutter step to start running. When he does that, his left hand goes in a fist and goes to his side, his right one goes under his shirt in his waistband and he starts running at me."