Uncredited/AP
The father of a Chechen immigrant killed in Florida by FBI agents investigating the Boston Marathon bombings demanded an explanation for the deadly shooting on Monday.
Abdulbaki Todashev's son, Ibragim, was killed in May while being questioned in his Orlando apartment. Ibragim was acquainted with dead Boston bombing suspect Tamerlan Tsarnaev.
Since then, the FBI has only said that a "violent confrontation was initiated" by Ibragim that resulted in his death.
The FBI has ordered the medical examiner to keep its autopsy report under wraps until the conclusion of an investigation into the encounter.
RELATED: CHECHEN FATHER CLAIMS SON KILLED BY FBI"He was innocent, and he was simply killed," said an emotional Todashev through a translator.
The dad's lawyer, Eric Ludin, said he would consider bringing a wrongful death lawsuit against the FBI following the conclusion of its investigation and an inquiry initiated by State Attorney Jeffrey Ashton.
"There was absolutely no weapon in the possession of our client's son," Ludin said, citing what he described as sources familiar with the investigation.
According to Ludin, Ibragim knew Tsarnaev through a gym they both frequented.
RELATED: BOSTON MARATHON BOMBING SUSPECT'S ACQUAINTANCE SHOT DEAD IN ORLANDO, FLORIDA 
Previous reports have said Ibragim implicated himself in a triple homicide, which possibly involved Tsarnaev, in Massachusetts two years ago.
But Ludin said there was no information lending credence to those reports.
Instead, Ludin said, Ibragim was cooperating with cops - even going so far as postponing a trip to Russia to speak to investigators.
"He delayed his trip home ... apparently in an effort to be cooperative," Ludin said. "He didn't survive that last questioning."
RELATED: BOSTON BOMBING SUSPECT'S FRIENDS CHARGED WITH OBSTRUCTION OF JUSTICELudin added that at the time of his death, Ibragim had recently undergone major knee surgery that would have made it difficult for him to attack FBI agents.
Hassan Shibly, the executive director of the Florida branch of the Council on American-Islamic Relations, said friends washing Ibragim's body had seen a dozen bullet wounds.
"It's been months, and we don't know why this individual was killed. It's about due process and law," Shibly said.
Two pals of the surviving Boston Marathon bombing suspect, Dzhokhar Tsarnaev, will be arraigned Tuesday afternoon in Boston Federal Court on charges of helping him hide evidence in the days after the deadly attack.
University of Massachusetts students Dias Kadyrbayev and Azamat Tazhayakov, both 19, face charges of conspiracy to obstruct justice, obstruction of justice and aiding and abetting a criminal.
