Qin Hui
According to "A Chinese Biographical Dictionary", "[Father and son] had not been two months in confinement when Qin Hui resolved to rid himself of his enemy. He wrote out with his own hand an order for the execution of Yue Fei, which was forthwith carried into effect; whereupon he immediate reported that Yue Fei had died in prison", which meant that Qin Hui had Yue and his son executed but reported they both died in captivity.