Domitian

On September 18, 31, Domitian was assassinated. An excerpt from the article:

"The final conspiracy against his life, however, was successful - a plot that even suggested the approval of Domitia herself (she remained fearful of her life.) According to Suetonius and others, a group of conspirators (they had heard their names were on a “list”) were debating on whether to assassinate the emperor in his bath or at dinner. Stephanus, a member of Domitian's imperial staff (he had been accused of embezzlement and feared for his life) approached the conspirators, offering his services. For several days he faked an arm injury and wore a protective wrapping; however, the bandage concealed a dagger. Approaching Parthenius, Domitian's valet, he said he had a list of possible conspirators and as Stephanus approached the emperor, he pulled out the dagger and stabbed the unsuspecting Domitian in the groin. The two men struggled with Domitian reaching for the knife he kept under his pillow but Parthenus had removed the blade. Then other conspirators hurried into the room and hacked the emperor to death. He was only forty-four years old. His ashes were taken by his old nurse Phyllus and interred in the Temple of Flavian."