Satrius Secundus was a dependent of Sejanus

Sejanus

Lucius Aelius Seianus , commonly known as Sejanus, was an ambitious soldier, friend and confidant of the Roman Emperor Tiberius...

 in the 1st century Roman empire

Roman Empire

The Roman Empire was the post-Republican period of the ancient Roman civilization, characterised by an autocratic form of government and large territorial holdings in Europe and around the Mediterranean....

. He accused Aulus Cremutius Cordus

Aulus Cremutius Cordus

Aulus Cremutius Cordus was a Roman historian. There are very few remaining fragments of his work, that covered the civil war and the reign of Augustus Caesar. In 25 AD he was forced by Sejanus who was praetorian prefect under Tiberius to take his life after being accused of maiestas...

 in 25 AD. He afterwards betrayed his master, and gave information to Tiberius

Tiberius

Tiberius , was Roman Emperor from 14 AD to 37 AD. Tiberius was by birth a Claudian, son of Tiberius Claudius Nero and Livia Drusilla. His mother divorced Nero and married Augustus in 39 BC, making him a step-son of Octavian...

 of the conspiracy which Sejanus had formed against him. Josephus

Josephus

Titus Flavius Josephus , also called Joseph ben Matityahu , was a 1st-century Romano-Jewish historian and hagiographer of priestly and royal ancestry who recorded Jewish history, with special emphasis on the 1st century AD and the First Jewish–Roman War, which resulted in the Destruction of...

 relates that Antonia

Antonia Minor

Antonia Minor , also known as Antonia the Younger or simply Antonia was the younger of two daughters of Roman politician Mark Antony and Octavia Minor. Tacitus Ann. 4.44.2 and 12.54.2 may have confused the two Antonia sisters...

 informed Tiberius of the conspiracy of Sejanus; and hence it has been conjectured that Secundus, unwilling or unable to have an interview with the emperor, had acquainted Antonia with the plot.

Secundus was married to the notorious Albucilla

Albucilla

Albucilla was the wife of Satrius Secundus, and was infamous for having had many lovers. In the last year of the reign of the emperor Tiberius, 37 AD, she was accused of treason, or impiety, against the emperor along with Gnaeus Domitius Ahenobarbus, Vibius Marsus, and Lucius Arruntius...

.