The tattoo and how Greenflower tried to hide it makes Gomb cautious. He keeps a good eye on the gnome as the group moves around the guildhouse and listens attentively to what he has to say to see if something feels off.
♣
Damn it! Damn it! Dmn it! DAMN IT! Gomb doesn't like the empty room, let alone the bloodstain at all. Registering Natrax's instruction, he quickly bolts past Aetgexe and dives for the closest window. On it! Once outside, he takes to the sky, soaring in a wide circle, keeping an eye on the surrounding streets. The pool on the floor was only mostly dry, so there might be a chance that he can spot, well, something. Judging by the amount of blood, someone's gravely injured at the very least, or more likely dead. That should slow down… Whoever they are after.

Spoiler: Checks!
Show
A retroactive sense motive for the conversation with the gnome: (1d20+5)[15]
As well as a Spot check to see a body, someone dragging a body, someone running away suspiciously or the like: (1d20+6)[20]