You’d have to ask the FBI that question petitfour.
Here is their website if you want to contact them:
Ivin’s lawyer is also the lawyer for the Thomas Tamm, the suspected leaker of the NSA ‘eavesdropping’ program ; that leak has done a lot of damage to our ability to gain time-critical information from terrorist communications abroad and as it happens, has crippled us in acquiring the hard evidence that enables us to get convictions without relying on purely circumstantial evidence.