A C-Sec officer needs a way to detect or deactivate Cerberus turrets left behind on the Citadel. Find Cerberus automated turret schematics and bring them to him in the Presidium Commons.
Eavesdrop on a C-Sec Officer in the Presidium Commons after the attack on the Citadel. He is standing next to a volus on a balcony just outside of the vid-wall hallway. He will mention needing to deactivate Cerberus turrets that are threatening civilians.
Alternatively, the mission can be triggered by acquiring the Turret Control Schematics during Tuchanka: Bomb prior to encountering the officer.
The C-Sec Officer is available only after the attack on the Citadel, although it is possible to obtain the schematics first. It is advisable to complete the timed mission Tuchanka: Bomb first, before approaching him.
Retrieve the schematics for the Cerberus turret from some crates before meeting with Lt. Victus. If you did not retrieve the schematics during the mission, you can purchase them at the Spectre Requisitions terminal in the Citadel Embassies for 1,000 credits.