Identities of the police agents who attempted to murder protesters during 2011-10-26 Occupy Oakland

Message from R.T.:
I've found a number of people are not aware of this, so I am posting what I've found.
The cop accused (please note, I'm -NOT- saying he did it - see below) of shooting Scott Olsen is Scott Bergstresser of the San Francisco Sheriff's Emergency Services Unit. See below:
[http://www.indiepundit.com/2011/10/29/iraq-war-vet-scott-olsen-police-shooter-identified-by-anonymous][http://www.dailykos.com/story/2011/10/28/1030842/-Is-This-Who-Shot-Scott-Olsen-and-Then-Attacked-His-Rescuers]
A blog claims that "an official police list puts Ceciel Yambao, Scott Bergstresser and Hugo Aparicio as being on the center front police line during the shooting" - [http://bsnorrell.blogspot.com/2011/10/video-who-shot-scott-olsen-at-occupy.html]. However, I don't see this information repeated elsewhere so I can't verify it. They are actually standing next to each other in various videos of the scene.
I've reviewed the YouTube videos that I have, and I cannot be absolutely sure since I don't have access to the original footage.

If you look at the video [www.youtube.com/watch?v=zEj_4fqDbnM]
At about 1:54, you can see the guy who shot the canister. Two people to his right (left for person watching the video) there is another taller cop with a riot shield. Bergstresser is taller than the people on either side of him, and the same is true of the cop who lobbed the tear gas canister at Olsen after he was hit. But you have to assume the cops didn't move when the shooting started. I don't think there is a clear ID. If you look at the "Bergstresser" video on YouTube, all it shows is Bergstresser in the police line before the actual shooting.


"Footage of Scott Olsen being shot by Police at Occupy Oakland" [www.youtube.com/watch?v=zEj_4fqDbnM]:
Uploaded by raleighl on Oct 27, 2011 
This footage is proof that Scott Olsen was shot in the face by police without provocation during the Occupy Oakland march on Tuesday October 25. 
The moment leading up to the shooting, Olsen was standing completely still.
He was then hit in the head with a tear gas canister, which is potentially fatal. 
At 1:17 You can see Scott Olsen being BLOWN BACK, and then his body hits the concrete. 
Also, no rocks or bottles were thrown before Olsen was shot, contrary to Police statements. 
Two angles of footage confirm this.  
Additional Footage courtesy of: Matt Kresling [mattkresling.com]  
Rina Palta, Ali Winston [informant.kalwnews.org] 
Will also be posted at: [newspartipation.com] 
To help scott olsen, visit [www.scottolsen.org]