 Piso akatanga kucherechedzwa mukupera kwa66 BC paakatonga Gaius Manilius anozivikanwawo saGaius Manilius Crispus, mutongi we plebeian uyo akanga ari mutsigiri waPompey. Kupomerwa kwacho kwakanga kuri kwezvematongerwe enyika; Manilius akanga apa mitemo iyo vanoruramiswa vakanga vasingafariri. Zvikurukuru lex Manilia iyo yakapa Pompey kutungamirira mauto eRoma kumabvazuva mukati mehondomukurwisana naMithridates. Pakutanga, Manilius akadzivirirwa naCicero, asi akasiya nyaya yacho pashure pokunge kutongwa kwacho kwakanganiswa nechisimba nemhomho yaibhadharwa. Piso akaenderera mberi nokutongwa kwacho, uye Manilius akatiza muguta racho asati atongwa. Achikurudzirwa nokushingaira kwaaiita achiri muduku, Piso akapomera zvakasimba munhu aiva nesimba uyo aitsigira Manilius, Pompey, waakanga asingafariri. Achinakidzwa, Pompey akabvunza Piso kuti nei asina kuenderera mberi achimupomerawo. Piso akapindura achiruma: 