Two specific accusations that are known are that Ma, by the route he took against the Wulin tribes, was responsible for the plague, and that he had, while on campaigns, embezzled pearls and rhinoceros horns.
Dua tuduhan tertentu yang dikenal adalah bahwa Ma, dengan rute ia mengambil melawan suku Wulin, bertanggung jawab untuk wabah, dan bahwa ia, sementara pada kampanye, menggelapkan mutiara dan cula badak.