Spence heard the disembodied voice, but the briefing had prepared him for that. He walked past, ignoring it. He had a mission, and the folks at HQ would not be pleased if he got sidetracked. 

A hooded figure was already talking to the target as he approached, but it didn't matter. He cleared his throat and tapped her on the shoulder, mentally rehearsing his speech: "Miss, on behalf of the Fliotan Intelligence Bureau, you are under arrest."