Information from Pookiesmommie – After a lot of help from Stormyeyesc & Vegasguy, I’m 100% sure we have found Dorian Johnson.
In the top three pictures below are still shots from the Us vs Them video:
https://www.youtube.com/watch?v=f8-x3wgXUA4
From the 7:24-7:52 you can see Dorian walking (looks like he’s being held up by the person in white) to a parking space to look at the crime scene. He may be realizing that Brown is dead and not injured.)

The next row of pictures (middle) was taken from a video that was shot at the crime scene tape near where Brown’s uncle (big man in black shirt) goes under the tape to view the body. The person that was recording moves positions and scans the area that Dorian is standing. The top row of pictures and the middle row are in the exact same location just from different views.
The last picture in the middle row is from the store video.
The last row of pictures (I know, very hard to see. Maybe someone can enhance them) are screen shots from the Black Canseco video at the 1:12-1:22 mark.

When the blue and white work truck pulls out of the parking lot onto Canfield, I believe Dorian Johnson is standing at the corner of the building and have circled what I believe to be him. These pictures would be mere seconds before he walks to the parking lot (first row of pictures). Of course the last picture is a map of the area. I’ve circled in red where I believe Dorian was standing in the Black Canseco video.



Tiffany car before and after discovery of bullet hole window.  Top (before) Bottom (after)
(video @2:20 across the street) This video segment referenced is after the CODE 1000 call.