The video picks up just moments before an Arizona DPS officer, with a sadistic grin on his face, breaks out the passenger side window at the same time a Border Patrol agent breaks out the driver's side window. Right after breaking Anderson's window, the DPS officer can be seen sticking his taser through the broken glass and pulling the trigger while continuing to grin wickedly:

After watching the video, it's fairly obvious the Arizona Department of Public Safety (DPS) had little to no legitimate basis to intervene. If the Border Patrol's K9 did indeed alert as the Border Patrol claim (and the DPS officer parroted without proof or first hand knowledge), the Border Patrol wouldn't have needed the presence or assistance of DPS officers to take further action.

Rather, the Border Patrol clearly used Arizona DPS to do the bulk of their dirty work for them while the State officers allowed themselves to be used by federal agents at a federal immigration checkpoint in which they were neither trained or certified to participate in or respond to.

Playing the video slowly, you can see the Arizona DPS officer on the passenger side with a sadistic grin on his face just before breaking the window:

(The Arizona DPS Officer who tasered an unarmed non-violent individual at a Border Patrol checkpoint has been identified as Officer J. Mitchell)

On the other side of the vehicle, Border Patrol surveillance footage along with Anderson's camera, show what appears to be a Border Patrol agent with a baton preparing to break out the driver's side window while an Arizona DPS officer directs the agent from behind.

(A DPS officer standing next to a Border Patrol agent holding a baton can be seen in the driver's side mirror)

Instead of protecting an Arizona citizen who was peacefully asserting his rights in the face of aggressive, over-reaching federal agents at a suspicionless federal checkpoint along a state highway, these so-called state 'public safety' officers chose to initiate potentially lethal violence instead.

At least it can't be said Arizona DPS officers don't know how to deliver service with a smile:

If you would really like to bring a smile to those responsible for this outrage at the Arizona Department of Public Safety, please consider donating to Steven Anderson's legal defense fund. It's my understanding that a civil rights lawsuit is also in the works.