A new mechanic was introduced in this game. In previous games, interrogating an informant would always reveal locations of Riddler puzzles. However this time, there's a chance where an informant would fight back and attack you.
Countering the attack seems to always knock him out. I think when I initially saw this happen, I was surprised and he hit me and ran off.
Is there a way to counter the attack so that I can still interrogate him afterward?