OLY-M4gery;
Non-bashing attempt at answers to your questions:

1) This was almost certainly not what most LEO's would call a "planned" takedown or stop. The infamous "Miami Firefight" in 1986 is supposed to be a learning tool for all agents, but my guess is they made many of the same errors here...16yr. later.
- No communications (or very limited coms) with local agencies
- No co-ordination with the locals either
- No or very limited identification of agents as LEO's (this almost got agents shot in Miami when the first responding uniforms could not tell who the good guys were)
-Very limited training and even less experience in Felony Stop procedures in real-world environments where citizens sometimes do irrational things because they are in "Condition Red" and have received NO training
(Cond. Red stress can, and does cause things like tunnel vision, tunnel hearing, failure to hear at all, heart rate increases that are almost unbelievable, etc...all well documented)
-The FBI will almost never ask for another agency's assistance on stops, etc. because that would mean they might have to share the credit!

2) See above...Cond. Red stress also effects officers, agents and witnesses...people can do some pretty bizarre things under stress because they are simply not able to think / plan logically once the SHTF

3) Who knows? It is, however, well documented that bullets often go where the vision is focused, even though this may not be the appropriate place to shoot. (Many times, rounds will impact weapons rather than center of mass because the weapon is where the focus was)

4) Again, who knows?

5) Nothing, other than it gave the agents one more potential BG to watch

Someone in the other thread going on this incident said that if the local street cops had done the stop you would never have heard anything about it because, probably, nothing would have happened. That is almost certainly true. FBI agents should stick to what they do best, and that almost never includes things street cops do every day.

Oly;
Did not see any tac-team info in the stories I read. FBI has many agents carrying rifles that are not experienced in entries or stops.

Focus might have been on head because agent was trying to ID suspect via face. Suspect photos almost never actually look like the person. Also, it is common to find the "right" vehicle driven by the wrong person, tag # wrong, etc.

Good to make people think in advance about how to handle something like this. No doubt the agent involved wishes he had thought a little more before he shot! (assuming it was a deliberate shot)... it could have been something as tragically simple as a sympathetic hand reaction (with finger on trigger / safety off!) to an attempt to grab/hold or steady his balance with the other hand. Still negligent.

Zak is all too right with his comments about what would have happened to a non-LEO in such a situation!!!!!!!

The BF/GF thing is a "human interest" angle for the vultures of the press. I guarantee they are not getting much from anyone else. The officers and agencies are doing CYA and the victim(s) are following their lawyers' directions.