Coruscant underworld police were police officers of the Coruscant Security Force who were responsible for patrolling the lower levels of the Galactic Republic capital planet Coruscant. Underworld cops were notoriously hardened and burly in comparison with the sleek Guardian police droids that maintained law and order in the upper reaches of Galactic City. The underworld police were also known for their heavy leather and metal armor with mechanical eye coverings, which gave them extra protection and anonymity, while denoting an authoritative presence. Coruscant cops patrolled both on foot and in police speeders and with the advent of the Clone Wars between the Republic and the Separatist Alliance, the underworld police also utilized the police gunship when needed.
When the fugitive Jedi Padawan Ahsoka Tano was lost by pursuing clone trooper forces, the Coruscant Security Force was alerted that she had last been seen heading into the lower levels. Coruscant cops in the underworld were notified and given wanted posters and descriptions of Tano. Several underworld police officers spotted her at a train station and gave pursuit but she managed to escape them. Later, two underworld officers noticed an explosion at a warehouse where Tano was and, reporting the anomaly, it lead to the capture of the wanted padawan. After the formation of the Galactic Empire, the Coruscant Security Force was bolstered by the addition of Imperial stormtroopers to maintain order in the lower levels. Stormtroopers would often patrol with the underworld police officers and both were used by the Empire to violently put down revolts and enforce Imperial re-location ordetention policies of undesirable aliens and suspected rebel sympathizers.