 He killed Heraclius, the "magister militum per Thracias", despite the payment of a ransom, probably because Heraclius was involved in the murder of Aspar.The support of Theodoric was fundamental for the overthrowing of Zeno and the rise of Basiliscus to the Byzantine throne (475), so Basiliscus confirmed him "magister militum" and gave him other honours.However, Theodoric was very upset when Basiliscus appointed his nephew Armatus "magister militum praesentialis", because he despised him.