Chechen Islamist brothers Tamerlan and Dzhokhar Tsarnaev planted two backpack bombs at the Boston Marathon finish line on April 15, 2013.

The bomb blasts killed three innocents and injured 264 more people in the area.

Tamerlan was killed in a gun fight with police and ran over by his brother on April 19, 2013. His brother Dzhokhar was captured the next afternoon.

The FBI was warned!

Russian authorities warned the FBI in 2011 about Tamerlan Tsarnaev, one of two Chechen brothers accused of carrying out last year’s Boston Marathon bombings, but U.S. authorities missed chances to detain him.

US authorities missed multiple chances to detain Tsarnaev when he was traveling to and from Dagestan terror training camps!

And the FBI did not tell the police in Boston about the trained terrorist in their midst.

And it took local and federal officials THREE days to identify the killers.
Nikolas Cruz was not the first killer who managed to stay under the FBI radar.