(F/N) overheard Rex and Cody's conversation about a Traitor in their ranks, he was behind the door, so he walks off.
But he takes a glance and sees one of the Clones, Slick, because of the hair, he saw (F/N) or Zero. (F/N) was still wearing the Sharpshooter armor and helmet.
Slick was now a suspect to (F/N), but (F/N) now knows that Slick will do the same, he'll use him as a scapegoat.
After Cody and Rex saw Slick, but didn't know it was Slick, (F/N) decided to fix the, didn't work. He saw R2-D2 watching him, (F/N) walked over rubbed R2's head.
"Don't worry, I'll tell them about me snooping later." R2 chirps, saying Secret safe.
He then goes to the head, no image, but sound, he finds an audio recording of Ventress talking to Slick, Slick must've used an Holographic Communication Device, because of the voice.
He hears footsteps, he takes the audio record out that he plugged in and hid, Rex and Cody entered. After they talked and left, (F/N) left undetected. He then went to the armory to get Zero's DC-15S, it was still good.
He looks at it and sets the gun to Stun.
He gets two more.