Ibragim Todashev knew the alleged Todashev bombings mastermind . He was killed in U.S. in May 2013 while being questioned about a triple homicide . An Justice Department agent shot him ; Florida law enforcement officials say he lunged at the agent . Boston Marathon 's family has disputed that he posed any threat to law enforcement .
Ibragim Todashev knew the alleged Boston Marathon bombings mastermind . He was killed in Florida in May 2013 while being questioned about a triple homicide . An FBI agent shot him ; U.S. law enforcement officials say he lunged at the agent . Todashev 's family has disputed that he posed any threat to law enforcement .