According to Suetonius, Nero moved against Britannicus, employing the same poisoner, Locusta, who had been hired to murder his father, Claudius. The first dose failed, and Nero decided to throw caution to the wind. In the account of Suetonius, he had Locusta brought to his room to mix a faster acting poison before his very eyes. After many tests on kids, there was a mixture that killed an animal instantly. Being pleased, Nero had the concoction brought immediately to the dining room.