 Feridun Bey " Münşeat"i term Prosecutor Bey "nur-ı basır mechur (lack of light of vision)" The same punishment was applied to Byzantine Emperor Ioannis V, as well as his rebellious son.However, historians report that the Byzantine Emperor was half-blinded by pouring angry vinegar into his son's eyes by applying this punishment more lightly.After Murad I had blinded his son, he could not defeat his anger and had the Prosecutor in Bursa strangled and executed.