Ibragim Todashev knew the 2013 Boston Marathon bombing mastermind . Dzhokhar Tsarnaev was later arrested and jailed . 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 . Khan 's family has denied that he posed any threat to law enforcement .
Ibragim Todashev knew the 2013 Boston Marathon bombing 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 . Khan 's family has denied that he posed any threat to law enforcement .