[Twistedsavant]

captured by mercenaries in Lagos because they spent too much niara, seem to be all alone..and more importantly, the spirits have told the the tribes shamans they are heralds of disaster for lagos.

[Mantis]

How did they get in trouble for spending too much money exactly?
As for the interrogation, if your players are good at keeping player info separate from character, just run it as a one at a time Q&A with some dice rolls to see just how much info the players should be throwing out. Meanwhile the others can be planning their own escapes or sitting passively waiting for death to take them (really, why wouldn't they be planning an escape?). At some point one of them will escape and then play it from there where they need to regroup and rescue who ever is still being interrogated. You could play up a timing thing where the guy currently being questioned could be about to be killed or have something valuable cut off and the others show up in the nick of time. You can only really play that out if all the players are present and bought into the story.
If you don't have players that can handle keeping character info separate, then get new players. Kidding, kidding. You could run that as an email based series of scenes until they escape or get set free or whatever but it requires you to run it between sessions so it needs to be prompt with the email.  Honestly, I'd go with the first option and just run it in session.

[Twistedsavant]

Re spending too much money? buying a variety of weapons at the black market and spending money in the amulet market. Sure the exchange rate for niara to Nuyen is 20 to 1 but still You drop 2 Million niara.. someone is bound to notice.(sadly they were not exactly discrete.) usually people who do that sort of Shopping are A.) In large groups with badges involving their Merc company or B.) very discrete. and C.) dont look completely like out of town oyibos.

I do plan to to do the scene in play for fun and  excitement Just tring to figure a way to mechanic the questioning so its not a total rip off or go the mind probe route. (which would be a ...logical tactic so to speak but totally robs players of a roleplaying chance. besides who doesn't love a good third world country interrogation scene!

[MarmaladeEffect]

Have the interrogators separate the PCs, then go through the interrogation with them one at a time, while the others watch. I've had a lot of fun with scenes like these, because the players always slip up, whether or not they're able to roleplay not having heard each other's stories. Just keep asking questions, interrupt them with another question if the interrogator doesn't like what he's hearing, and apply a little common sense to see the holes in their story. As they say more and more far-fetched things, keep asking for evidence, proof, or "do you expect me to believe that..." and then rewording what they just said so it sounds as ridiculous as possible.