[1] Sempronius belonged to the patrician Sempronia gens and the branch known as the Sempronii Atratini, one of the republic's oldest consular families, having reached the consulship in 497 BC.
Sempronius fought against the Volscians during the consulship and failed in this endeavour to such an extent that he was placed on trial the following year for "endangering his army".
The prosecution was handed over to Junius' successor in the tribuneship, Lucius Hortenius, while the defence was led by Sextus Tempanius, a former cavalry decurio under Sempronius, who had been elected plebeian tribune for the sole reason of defending Sempronius.
Eventually, in 420 BC, through the combined effort of three plebeian tribunes, Aulus Antistius, Sextus Pompilius and Marcus Canuleius, the former consul was convicted and forced to pay heavy fines.
[3][4][5][6][7] Sempronius trial and eventual conviction seems to have severely affected his career as he does not appear in sources after this, while both his cousin, Aulus Sempronius, and his former consular colleague, Quintus Fabius, went on to have lucrative careers that involved holding the imperium on a number of occasions.