Assuming Roan could fill Jelena in about the Techno Union's representative here being a Kio colony that reads as a great many beings rather than a single being, could they try finding him again? I doubt that there is a massacre going on in the park, and that representative just gave us a good chunk of information. Perhaps someone wanted to silence him a bit too late...
I have a feeling that Kathya was the one that performed this execution, simply because she is the only henchman that Sienar has left. She will be heading back to the Basilica, no doubt.
Is there any evidence that Jelena can glean from the murdered colony? And is there anyone around, namely Senatorial guards, that she can set to guard the crime scene and make people aware of it?
Then Jelena will alert the Senatorial guard, request that they clear the crime scene, and that they send everyone back to their acommodations, for their personal protection.
"We need to return to the Basilica," Jelena tells Roan. "I have a feeling that our murderer has returned there, too, to inform her master that she was able to kill the colony successfully."
Jelena will start heading back to the Basilica, ready to confront Kathya and hopefully find Andro and Gallagher intact.
The Guards will try and keep people clear, but they apologise and say they have neither the authority nor, frankly, the capacity tp evacuate several hundred Senators, spontaneously, in any orderly fashion. They'll try and spread the word but they lacking any apparent threat- because they are not entirely sure what you are shwoing them here- they need the assent of their masters to act.
You as Jedi could sort that out... if you hang around here...
Jelena feels like the damage has already been done, here. There is not really anyone else that Sienar would want silenced, except for maybe the Deel Twain bio-bot... which I am guessing is programmed not to reveal itself and continue acting as Twain from now on.
Could the Senatorial guards locate Twain for us?
(Hope he ain't dead...)
Andro stop to consider the movement and finding nothing continues on. He gets the feeling that the whole situation, this whole mission, is coming down to the next few actions. He feels the urge to draw his saber to be ready, but even though it's empty here, ANdro reminds himself that he's the very last Jedi that needs to be seen with his saber out in here. He keeps his coure, but remains ready... something is about to happen.... he's sure..