Even if their initial spawn and flight are triggered, they may still fail to appear in the Restoration Zone as they should. However, depending on the player's interactions and order of operations, the criminals may fail to spawn entirely.
When the player's party finally reaches the zone themselves, the two killers will then be the first Czerka mercenaries encountered. When the player confronts them, they then flee to board a Czerka shuttle to the Restoration Zone. The Rodian and Devaronian described by Lieutenant Grenn are supposed to appear in the Czerka offices - specifically, standing at Jana Lorso's desk conversing with her - after the player learns about the bounty from Grenn.
'TSF Bounty: Escaped Criminals' breaking, the Rodian and Devaronian vanishing Previously reported Glitches for KOTOR 2.