The early 15th-century Bulgarian scholar and cleric Gregory Tsamblak says that Michael Shishman was captured and killed by the son of the Serbian king, Stephen Dušan.
O historiador e clérigo búlgaro de principios do século XV Gregorio Tsamblak afirma que Miguel foi capturado e asasinado polo fillo do rei serbio, Estevo Dušan.