Decimus Laelius Balbus was a Roman senator and delator or informer, active during the Principate.
[2] Balbus himself first enters history when in AD 37 he accused Acutia, the former wife of Publius Vitellius, of maiestas.
Following her conviction, when the Senate voted on his reward, the plebeian tribune Junius Otho interposed with his veto.
[4] At some point in his career Balbus was involved in a famous legal case, the pro Voluseno Catulo, concerning Lucius Volusenus Catulus.
While we know from Quintillian the names of his defenders, who include Gnaeus Domitius Afer and Gaius Passienus Crispus as well as Balbus, we know nothing of the charges, the verdict, or the prosecutors.