Incarceration "(publica custodia)" in facilities such as the Tullianum was intended to be a temporary measure prior to trial or execution; abuses of this principle occurred but were officially censured. Located near the law courts, the Tullianum was used as a jail or holding cell for short periods before executions and as a site for executions. In 63 BC, certain co-conspirators of Catiline, including Publius Cornelius Lentulus Sura, were held briefly in the Tullianum and executed there for their alleged plot to overthrow the government. In this case, the executions were conducted hastily, without due process of appeal, during the consulship of Cicero, who was later exiled for his actions. Sejanus was held in the Tullianum before his baroque execution, which involved the Gemonian stairs, and the conflicting accounts of the end of Pleminius include a timely death in jail during trial. Some Gracchan sympathizers ended up in the "Carcer", where the haruspex Herennius Siculus hit his head on an architrave and died before he could be executed.