In the end, Gallagher, you found nothing at the crime scenes, and later analysis of the body and of the room finds no traces of anything or anyone else at all; someone was very careful not to leave even the smallest oof traces for genetic sniffers to pick up. No droid was in the right place, no camera caught the incident (there were no cams inside the home itself; it's not that kind of planet).
"This one will have to come down to good old fashioned detective work, Gallagher," says Korth, "though a few good gusses wouldn;t go amiss. Logic and instinct in equal proportions, that's always the way. Balance between the two, never one without the other."
Before long you have a potential suspect profile in place. Most likely human or human like, else they would have stood out too much on this planet or at any starport, likely male- strong enough to have dragged Zolos uop those staiurs and thrown him over the building- and very likely with some kind of psychotic tendency, and the unnecessary method of Zolos' death dictates, having dragged him all the way up to throw him off. So it is from there that you first form the toery of some kind of mentally disturbed perpetrator. That left many questions, but at least something to look for.
And as soon as you think of him, your memories shift... running desperately towards the scene... coming in, and seeing that murder standing above your sister's body...
---
At this point the far door slides briskly open, Andro, revealing the cloaked form o Sienar.
"Forgive me, Jedi, for my delay... there is much I have to attend to. Ah, Andro... I thought we might meet again."