It was revealed late Friday, that the FBI had once investigated Boston bombing suspect Tamerlan Tsarnaev for possible extremist ties but didn’t find anything. Tamerlan is the now-deceased older of the two brothers.

In an interview with Fox and Friends this morning, Senator Lindsey Graham revealed new details about the investigation.

According a conversation Graham had with the assistant director of the FBI, the Russian government requested that the U.S. look into Tsarnaev in 2011. He was interviewed, as were his parents and those associated with him.

The FBI wrote the Russians back with all of the information they’d gathered and asked if they had anything else on him and the Russians never responded.

The FBI wasn’t aware of Tsarnaev’s 2012 trip to Russia because when he boarded the plane, his name was misspelled so it never went into the system.

Graham said, “Once the Russians made the request, the FBI did a good job of looking at him. The reason we didn’t know he went to Russia is because the name was misspelled. But in 2012 and '13 when he became more radical, when he went on the internet, when he interacted with this imam in Boston, the FBI tells me there’s limitations on what they can do in situations like that. So, we need to revisit our laws. We’re at war with radical Islam.”

“The sooner we realize we’re at war with radical Islam and come up with systems to defend ourselves, the better off we’ll be.”  

He also stressed the need for Dzhokhar Tsarnaev to be treated as a potential enemy combatant. “When American citizens sided with the enemies in other wars, they were treated as an enemy combatant. They should he here.”