I have zero info on how the police or the mercs are outfitted, how many police there are and what their typical patrol behavior is or how they treat the locals and (more importantly) how they treat non-locals.
When Dr Demarcus was there the police had random foot patrols consiting of one or two police droids or the ocasional organic. There is also the typical police suvalience througout the city (think street cameras/ traffic cameras). The droids carry stun battons. Organics cary blaster pistols. There are specilized units that are better equipped.
Whether the corp has its own private security. And I don't know what else Demarcus has divulged that may relevant to our grabbing his family.
The corporation does have their own security and which are basically trained mercenaries and droids. Dr Demarcus family lives in the corporation's private residential area which is guarded by their security. His house also has a basic security system but he has provided the alarm codes (or at least the codes that were used before his recruitment).
And I don't know what else Demarcus has divulged that may relevant to our grabbing his family. Other than being on Nubia, I'm assuming we don't know where they're being held? Continent? City? District? Building? Once we get to Nubia, is it possible to search the local computer net to locate them, if we don't already know where they're at?
He believes his family will be safe for a short period of time. Once the imperials are notified of the coup of the base they may or may not target his family. It depends on if they believe he was involved or if they are just vindictive. If they have not yet been targeted they should be at their residence, which he has provided the location of. If they have been targeted they would most likely have been picked up by local police or imperials and take to the local police holding cells pending a pick up by imperial intelligence... The alliance fears they may just be executed on the spot. The local computer net should provide locations to the corporations residential area and to the local police stations. Hacking into either system may prove difficult as they are both security systems.
Additionally the alliance has identified that the Credits First Mercenary Group has targeted the family for the bout. Last known intelligence shows the group consisting of 4 very skilled personnel.