When Tiberius died in the year 37, Macro sided with the new Emperor Caligula. According to Tacitus, Macro even played a role in bringing about Caligula's rise to power, by ordering Tiberius to be killed after it was revealed that reports of his death had been premature: Caligula had begun to take power immediately upon hearing that Tiberius had died of natural causes but without making sure that Tiberius was dead. Tiberius was still alive and, shortly after, was heard calling for food. In order to prevent an embarrassing and potentially dangerous situation, should Tiberius have reacted angrily to Caligula's hasty ascension to power, Macro "ordered the old Emperor to be smothered under a huge heap of clothes."