Michael Hayden, a former CIA and National Security Agency director, said Monday revealing the identity of confidential sources erodes intelligence gathering and law enforcement, days after the name of a suspected FBI informant who spoke with three members of the Trump campaign was leaked to the media.

“I’m very concerned. Look, we used to recruit people and one of the things we would guarantee them is that we can protect you. And now we see the erosion of that in this particular episode,” Hayden said during an interview with CNN.