After multiple games of getting frustrated with grabbing someone interrogating, then trying to throw them to the ground/choking them out, but I end up letting them go. I assumed there was a bug/lag going on because my first interrogate, I immediately stunned-> fulton'd them. But I clearly had a hold of a person that didn't utilize their break free action. I went into a 1v1 much with my buddy, and we tested that you really only have enough time to interrogate or to stun if they are correctly spamming (Y, triangle). Two things out of this:
Defender: If you are grabbed spam your top button (Y, triangle). If the opponent decides to interrogate, they shouldn't be able to also stun-> fulton you. It is crazy how fast you actually get out of their grip.
Attacker: If you decide to interrogate, be ready for them to break free. I have not been able to immediately regrab so don't just stand there and try.