“Every juror should be questioned under oath to start.”
Do you seriously think they would tell the truth, even under oath? Nobody would prosecute for perjury, and they know that for sure.
But the phone records, FB records, etc would show the lie if they did, and then there would be perjury charges. Or should be anyway. I suppose Bragg could refuse to charge but if that got out it would set him up for prosecutorial misconduct I would think.