This is a really serious problem. There's a reason why the normal process of justice involves presenting evidence in public rather than just saying, "We know this guy is guilty because reasons we can't tell you. Don't worry, we've already executed him."

The fight has to be done procedurally or we'll end up shelling Parisian suburbs.

I can assure you that if they had any success, they'd be taking out full-page ads in the NYT and WaPo. When the Snowden revelations happened, after searching far and wide, they came up with 1 name: David Headley. It turns out, he was already well known to the US agencies, and it was a lie.