Reinhold said that Mohammad Youssef Abdulazeez was radicalized online by watching videos before the July 16 attack, and people who had prior knowledge of his new beliefs failed to report him to authorities.
"We believe there were people who understand he wanted to commit jihad but they may not have necessarily believe him at that point, it's unclear at this point," Reinhold said.
The FBI would not say who knew, or if they will face charges. They're still investigating the terror attacks and looking into the shooter's friends, family, and everyone he had a relationship with in Chattanooga and overseas.
"Well we continue to look at the shooter's history, all the way to the time he came to this country and before," Reinhold said, "Now he was only four months old when he came to this country so basically he was raised here."
"Based on his [Abdulazeez] desire to commit jihad that he wanted to hit the US military and he did not want to over seas to do it, he wanted to make a bigger impact; he felt it would make a bigger impact if he did it here."
FBI: This was the first time a non-US military person committed violence against the US military on US soil. @WRCB#ChattanoogaShootings