That's the 64 thousand dollar question. Sounds like illegal wiretapping to me. Or Crump is lying again. GZ isn't going to get out of this. It has had set up on it from the minute Jesse, Al and Hussein jumped in. I'd have exit plans in the works and the means to leave within a moment's notice.
Jailhouse recordings. Nothing you say during visits is private.
There is nothing illegal about it. All calls from the jail are recorded and available to the courts then to the public. He is told every time he makes a call that his calls are recorded.