And finally, after the senate had voted immunity to the man of Croton on condition that he gave information, Lentulus was convicted, resigned his office (he was then praetor), and laying aside his purple-bordered toga in the senate, assumed in its place a garment suitable to his predicament. He and his associates, therefore, were handed over to the praetors for custody without fetters.
Edition :
Plutarch Lives VII: Demosthenes and Cicero, Alexander and Caesar, ed. E. H. Warmington, trans. Bernadotte Perrin (The Loeb Classical Library 99), Cambridge - London 1967 (first ed. 1919).
Notes :
After Catalina left Rome his former associates gathered and persued the conspiracy. Cicero observed their schemes and brought this to the attention of the senate.