According to both Roman and Jewish sources, the Sanhedrin ceased prosecuting capital cases after Rome asserted control over Jerusalem/Judea c. 6 CE.

When Rome co–opted the Sanhedrin c. 6 CE, by imposing the High Priest (which Rome selected) as head of the Sanhedrin in lieu of the nassi (president), the prerogative of the Sanhedrin is effectively neutralized.

The co–opted Sanhedrin of that era indeed later dissolves completely in 68 CE in the wake of the Roman military counter–onslaught, as the Jewish community in Judea implodes under Roman assault, destruction, and subsequent exile in the decade following–upon 68 CE.

63 BCE: ROMAN GENERAL POMPEY…

Roman general Pompey maneuvers for conquest of Judea.

He enters Judea with his forces and, allied for the moment with Hyrcanus II (of the Maccabeean dynasty), captures Jerusalem from Aristobulus (also of the Maccabeean Dynasty).

The internecine Jewish fighting between Hyrcanus II and Aristobulus had given General Pompey the opening to capture Jerusalem with minimal cost. The fighting was an offshoot of total Hasmonean squandering of the political capital bequeathed to them by Matisyahu and his son, Judah the Maccabee.

General Pompey first appoints (the weak) Hyrcanus II as a puppet–government symbol via the high priesthood, and dispatches Aristobulus, nemesis of Hyrcanus II and