Humint is a key element.
Brennan and the rest are leaving Humint ghost cookies for folks to trail.
“...ghost cookies for folks to trail.”
there once was a man who found a skunk in his basement and afraid if he disturbed it the skunk would stink up the whole house.
So he put a trail of crumbs from the basement door out to the field so that the skunk would leave on its own.
The next morning the guy saw the crumbs were gone. Checking in the basement he found there were two skunks.