Ibragim Todashev, in an undated booking photo provided by the Orange County (Fla.) Corrections Department.
March 21, 2014 Twenty-seven-year-old Ibragim Todashev was killed while being questioned by agents in his Orlando home about his friendship with suspected Boston Marathon bomber Tamerlan Tsarnaev.
Tamerlan Tsarnaev, as seen in a video taken on April 15 near the finish line of the Boston Marathon.
October 23, 2013 Tamerlan Tsarnaev died after a gun battle with police. A friend, who's also now dead, told investigators that Tsarnaev was involved in a 2011 triple murder. Tsarnaev and his brother Dzhokhar are the lone suspects in last April's bombings at the Boston Marathon.
May 23, 2013 Ibragim Todashev, law enforcement sources tell NPR and other news outlets, was being questioned about the 2011 killings of three men in Waltham, Mass. Boston bombings suspect Tamerlan Tsarnaev has also been linked to that unsolved case.
May 22, 2013 A friend of the man killed Wednesday in Orlando says the FBI was questioning the man about his connection to Tamerlan Tsarnaev, one of the men suspected of planting the bombs in Boston.
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