After the police had investigated, they hadn't discovered any clues. The gangsters didn't display any injuries, not even a speck of dust on their clothes, making them appear as if they hadn't been in any fight.
After being taken to the hospital, an examination revealed no injuries on the gangsters. However, a psychiatric evaluation later showed that they had all indeed become idiots.
What exactly happened to these gangsters remained an unresolved mystery.
Still, many people speculated privately that these thugs were getting their just desserts, suggesting that perhaps the heavenly deities couldn't stand by and thus inflicted this punishment.