They were not suffering from any chronic mental condition, temporary psychological disability, dementia or any other psychiatric condition that prevented them from understanding the public danger of their actions MOSCOW, July 25. /TASS/. A forensic study found that the four perpetrators of the Crocus City Hall terror attack were not suffering from any mental conditions at the time of the attack and realized the consequences of their actions, according to case files obtained by TASS. "Shamsidin