The New York Times reported last year that F.B.I. agents fatally shot 70 “subjects” and wounded about 80 others from 1993 to early 2011, and that in every case, the agent’s use of force was deemed justified.

Tuesday’s reports about what occurred in Orlando, after the Boston Marathon bombing, were different from the initial accounts provided by the F.B.I. In the aftermath of the shooting, federal law enforcement officials said Mr. Todashev ran at the F.B.I. agent after he knocked him to the ground.

The F.B.I. agent, who was based in Boston and was not identified in the reports, went to Florida in May with two Massachusetts State Police detectives to interview Mr. Todashev as part of the investigation into the Boston Marathon bombing suspects, Tamerlan and Dzhokhar Tsarnaev. (The authorities have uncovered no evidence tying Mr. Todashev to the bombing last April, which killed three people and wounded more than 260.)

While the investigators in Florida and the Justice Department cleared the agent, a joint panel of F.B.I. and Justice Department officials will continue to study the shooting to determine whether lessons can be learned from it.

That panel will most likely examine the decision to interview the man in his home. Mr. Todashev, who had initially said he was willing to meet the authorities at a secure location, then said he would meet them only at his apartment.

According to the documents, the agent and the detectives knew that Mr. Todashev had a violent history, was experienced in martial arts and had probably played a role in the homicides.

As part of an effort to balance “between the competing factors of developing an amicable rapport conducive to gaining information and the potential risk presented by a murder suspect in the freedom of his own residence,” the agent and detectives did not initially search Mr. Todashev or the apartment for weapons, according to the report released by officials in Washington.