Of course I'm leaving stuff out. It's a long story and I don't know all of it. In fact, the FBI and Florida have made it pretty hard for anyone to get all the details but I digress.
Regarding violence, you're right. Thanks to the detective work of those at the Boston Globe, we also know that the FBI agent wasn't exactly squeaky clean either.
The Boston FBI agent who fatally shot a Chechen friend of Tamerlan Tsarnaev in Florida last year had a brief and troubled past at the Oakland Police Department in California. In four years, Officer #8313 took the Fifth at a police corruption trial and was the subject of two police brutality lawsuits and four internal affairs investigations. He retired from the department in 2004 at age 31.
[He] ... was involved in several controversies during his four years with that police force. He retired with a pension of more than $52,000 annually for the rest of his life.
Regarding the headshot, I'm not sure where you're getting your info:
Todashev, the mixed martial arts student, was holding a pole and looked — according to the trooper's testimony — as if he intended to "impale" the trooper.
The trooper didn't move, but a volley of gunshots from the FBI agent rang out on his right. According to the medical examiner's report included in Ashton's documents, Todashev was shot three times in the left side, penetrating his lungs and heart.
Todashev was wielding a broom handle; the FBI agent, a .40-caliber Glock 23 pistol.
...
The FBI agent fired again. One bullet went down through the top of Todashev's head, and the other three entered his back, likely because of his twisting body, according to the medical examiner.
