Caesar's Gang is the informal title of a criminal organization established in Lower Sharn, under the jurisdiction of Watchtower 11. Obviously a young organization, it has only a few confirmed members, including its boss, Caesar.
Caesar's Gang was introduced on the very first session of the campaign, as Kueller McDrevduul, flanked by two lackies, was shaking down shop owner Oskar for protection money. After intimidating him into leaving, the party tracked Kueller to Caesar's hideout and demanded the return of their stolen property.
Ceasar's Gang next hired Ray to investigate a robbery at Oskar's shop, apparently making good on their protection racket. The party resolved the incident and Caesar duly paid the fee.