Analysis of #DallasPDShooting Footage Prior to Shooting.https://www.youtube.com/watch?v=DvQRcUx4EQw[youtube]https://www.youtube.com/watch?v=DvQRcUx4EQw[/youtube]
Analysis of this footage provide by suchbs.com, video is copyright of the uploader on Youtube.
This video has extra footage before the start of the police shootout in front of the Jack Evans Police Headquarters. The footage appears to have been shot from the Soda Bar, kitty-corner from the PD building, across the south side of Lamar St, west of Belleview St. Google lists the Soda Bar as a "retro-industrial hotel roof bar with infinity pool-side views of the city & an outdoor fire pit." You can look at some pictures
here.

As the video begins, it appears that there is some sort of alarm going off inside the Police Department (PD). There is a light blue strobe going off inside the building at all levels, it is particularly noticeable on the north-west side of the building facing Belleview St., as most of the lights appear to be off on that side of the building.
At about the 0:04 second mark, a female asks "what is it," a male responds "it's an armored car shooting into the police station."
At about 0:05 seconds, the armored van parked outside the PD comes into view. Its lights are on, but no way to tell if it is running. It is interesting to notice that traffic is still passing by the PD normally on Lamar St.
At around the 0:13 second mark, some loud snapping sounds appear to be coming from across the street at the PD. These could possibly be gunshots. An unidentified male at 0:18 seconds then says, "Somebody is shooting inside the police station."
At around 0:39 seconds, two persons move into the camera's view. They are walking along the south side of the building. The person who appears first on the camera will be referenced as "Individual A," the person following "A" will be referenced as "Individual B."

At 0:51 mark, a witness identifies them as "two police officers."
At the 0:58 mark a male says "somebody is shooting inside the building." Another male responds, "someone is shooting in there." Someone reiterates, "yeah, there's shooting inside the building."
At 0:58 mark the two officers reach the corner of the building and stop for a few seconds (until 1:03 mark). It is interesting to note that, at this point, they are not focusing on the armored van parked on the street, but instead they seem to be attempting to secure the building.

At the 1:03 mark, "Individual A" rounds the corner and begins to walk along the short western wall of the PD, which runs parallel with Belleview. "Individual B" hangs back at the corner, in a covering position. It still appears that they are focused on securing the building.

At the 1:12 mark, "Indvidual A" passes a first floor window, the only window on that particular west facing wall. At this mark, a third person, who we will refer to as "Individual C," appears to stand up and can be seen in the window.


At about the 1:14 mark, "Individual A" appears to be looking through a window into the main lobby of the PD.

At 1:17 mark a conversation between the bystanders takes place. A male say "see everybody running," (no persons can be seen running on from this angle). Same male says, "there is gunfire inside the building." A female replies, "oh yeah, you can see somebody in that building right there."
At this point, 1:25 mark, "Individual A" is now peering around the corner into the main lobby through the front entry doors.

1:26 mark, same male as before says to female, "ummm...there's the officers in the corner." Female responds, "I know, but there's somebody in there. There is like a red light."
At 1:29 mark, camera man begins to shift to get a different angle, we lose sight of the scene. "Individual C" is clearly visible in the same window.

At 1:41 mark, we regain a view of the scene. "Individual A" walks back toward "Individual B."
Camera pulls off the building to look at police cars arriving on the scene @ 1:45 mark.
At 1:57 mark we see pan back to where "Individual B" has been standing during this whole time, there is no way to tell whether both persons are there, or if one of them has started heading towards the armored van yet.
Camera then cuts back towards the arriving squad cars.
At 2:08 mark, we see someone walking towards the armored van with a flashlight, presumably this is either "Individual A" or "B". The shooting then takes place.