The bullets blew out the top of his head and killed him instantly .
British ballistics expert David Prayer said Allende died of two shots fired from an assault rifle that was held between his legs and under his chin and was set to fire automatically .
The bullets blew out the top of Allende 's head and killed him instantly .
British ballistics expert David Prayer said Allende died of two shots fired from an assault rifle that was held between his legs and under his chin and was set to fire automatically .