The quote from the second official:
They got him to confess to the homicides, and they say, 'Let's write it down,' and he starts writing it down. He goes to get a cigarette or something and then he goes off the deep end. I don't know what triggered him, and he goes after the agent.
The same day, the Orlando Sentinel reports, "Federal officials said he lunged at the agent with a knife during questioning, and the agent opened fire."
The Associated Press also reported that "law enforcement officials say a man was shot while he was being
questioned in the Boston Marathon bombing case after he lunged at an FBI agent with a knife," adding, "The FBI initially said the agent fired the fatal shot, but later in the
day the bureau left open the question of who was responsible." And Dave Couvertier, "a special agent and spokesman for the FBI's Tampa field office," told Yahoo News that an FBI team would be dispatched from D.C. to investigate the shooting, and that the FBI agent "sustained non-life-threatening injuries."
The FBI also put out a statement on May 22:
The FBI is currently reviewing a shooting incident
involving an FBI special agent. Based on preliminary information, the
incident occurred in Orlando, Florida during the early morning hours of
May 22, 2013. The agent, two Massachusetts State Police troopers, and
other law enforcement personnel were interviewing an individual in
connection with the Boston Marathon bombing investigation when a violent
confrontation was initiated by the individual. During the
confrontation, the individual was killed and the agent sustained
non-life threatening injuries. As this incident is under review, we have
no further details at this time.
A friend of the dead man, Khusen Taramov, told a TV station, "They were talking to us, both of us, right? And they said they need him for a little more, for a couple more hours, and I left, and they told me they're going to bring him back. They never brought him back."
That brings us to the last story of that day, time-stamped after 8pm by the Associated Press, which reported: "Three law enforcement officials, speaking on condition of anonymity,
said Todashev had lunged at the FBI agent with a knife. However, two of
those officials said later in the day it was no longer clear what had
happened. The third official had not received any new information."
The Orlando Sentinel reports that "an FBI review team from Washington was in Orlando on Thursday investigating the death of Ibragim Todashev," and that they'd be questioning "witnesses who were at the Orlando condo when the shooting occurred early
Wednesday morning, including two Massachusetts State Police troopers
and other law-enforcement officials."
The story ads that "the FBI agent who fired the lethal shot, who has not been publicly identified, is from the agency's Boston division," and "an autopsy was expected to be completed Thursday, but the report will
not be made public for several weeks -- if not months -- because the case
is under criminal investigation." The FBI team investigating the killing is reported to be 13 agents strong.