Although the surveillance footage didn't capture his face, subsequent feedback from the bee and dog attacks indicated that the sneaky individual who had released the crocodile gar into the fish pond, and then got stung by wasps and bitten by dogs, was indeed the bald man.
Suming wouldn't believe it was just the bald man's personal actions and had nothing to do with Zhou Jin, even if you killed him.
The bald man's backer was Zhou Jin. Zhou Jin had already clearly threatened Suming over the phone last time, and besides, releasing crocodile gar to wreck the fish pond ecology, this kind of 'technical' sneaky move, was not something the bald man with his level of intelligence could come up with.
Putting all these incidents together, the mastermind behind them could only be Zhou Jin without a doubt.