in response, tiberius manoeuvered cleverly. he knew an immediate condemnation of sejanus might not succeed. since he and sejanus were then joint consuls, tiberius resigned his post of consul, which forced sejanus to do likewise. this removed much of sejanus' legal powers and protection. then, in ad 31, sejanus was summoned to a meeting of the senate, where a letter from tiberius was read condemning sejanus and ordering his immediate execution. macro was appointed praetorian prefect, with the specific job of removing sejanus. sejanus was tried, and he and several of his colleagues were executed within the week.