Authentication tech specialist Nanotech Security Corp was sold to Meta Materials for $73 million just three years ago.
Amid reports that counterfeits worth $31m may have been sold to high-end clients, Wood Chen has protested his innocence.
Adulteration of vegetable oils is associated with more health consequences than any other form of food fraud.
Snacks that mimic brands have been linked to hundreds of hospitalisations in adults and children.
Pesticides sold on the black market poisoned farmland and nature reserves in Italy and Spain, says Europol.
Stuart Perkins falsified Salmonella testing certificates, potentially allowing contaminated meat into the food chain.