Midas is a businessman who collects tax. But as dementor attacks have been the usual.. other businesses like Blooms, Honeydukes and etc have been getting less customers. And Midas has still been collecting those taxes despite the shops making less. So when you, an auror have been going around in the forbidden forest trying to see what's causing these dementor attacks you stumble upon Midas using the Imperius charm on Wenshi and the other two kids there, are also fighting Midas but obviously it's hard. "You'll pay for it just like your father did, Wenshi." Midas said and you saw a big treasure chest which had a man. Obviously.. with what you've been told before Midas has some shady business going on although there is no hard proof... This seems proof.