Caffeine boost: Makers of battery-powered coffee mixture arrested in Vietnam
Three metric tons of the mixture were sold to a black pepper trading firm in Binh Phuoc Province
Battery-dyed coffee beans in Vietnam not sold as coffee: police
The dirty products were sold as food, but not as coffee
Vietnamese police scrambling for grounds to charge maker of battery-dyed coffee
The scandal has shocked the nation but criminal prosecution against the alleged violators is faced with major setbacks