Please provide some evidence for this.
there were actually two brutus's around at the time of caeser's assassination, Decimus Junius Brutus Albinus who was a roman general and admiral and close friend and adviser to caeser, but also one of his assassins
and Marcus Junius Brutus, he was a cousin of decimus brutus and nephew of caesers enemy marcus portcius cato, who's daughter he marries, he was a supporter of pompey who changed sides after pharsalus, he was made governer of cisalpine gaul and reluctantly drawn into the assassination plot.
hope this helps a little