This CSI screencap contains
pak.
There might also be
draaideur, revolver, straat, stad scène, stedelijke omgeving, stad straatbeeld, stedelijke instellen, goed gekleed persoon, pak, broek pak, broekpak, and kostuum broek.
Jack picks up on the vibes between Sara and Grissom. We learn the name of their dog is Hank, not Bruno (his actual name). A reference to Sara's ex, perhaps, of just coincidence?