Kirk Assassin Not Cooperating with Authorities

"He has not confessed to authorities. He is not cooperating, but all the people around him are cooperating. And I think that's very important," Cox told ABC's "This Week" host Martha Raddatz.

"All we can confirm is that those conversations definitely were happening, and they did not believe it was actually him. It was, it was all joking, until he… admitted that it actually was him," Cox said.

Cox told the Wall Street Journal the suspect was "deeply indoctrinated with leftist ideology," according to an interview published Friday.

Raddatz pressed Cox for evidence supporting the claim.

"So far, that has come from his acquaintances and his family members," he said.

Raddatz asked Cox what needed to happen for this moment to become a turning point in history, referencing his remarks Friday that described the shooting as a watershed moment.

"You know, right now we are in a dark place. Everybody gets that, I think. And we have choices. In my political philosophy and in my religious philosophy, we believe in agency – that every one of us gets to make our own decisions," he said. "Can we do good in our neighborhood? Can we hug a family member? Can we talk to a neighbor we disagree with? That’s up to us. That’s the only way out. There’s nothing else we can do to solve this dark chapter in our history."