Egypt’s public prosecution announced Monday evening that it concluded its investigation into the death of economic researcher Ayman Hadhoud and has ruled out any foul play after an autopsy stated he had died from a heart attack. The prosecution’s office posted a statement on its official Facebook page which said that the forensic medical authority found no injuries on Hadhoud’s body that may indicate assault, violence, resistance, or other suspicious actions. Neither any traces of drugs nor poisonous substances were found in the deceased’s blood, the statement added. According to the prosecuti…