What kind of fraud are you engaging in pastor? I think those kind of non-verbal cues don't work with Nyeuthi. The mzungu is an open book. Mwafrika you really can't tell when he is lying or not. Most of wafrika are pathological liars anyway - brought up to be that way by hard circumstance of life - so lying with a straight face is the norm. What works here maybe is TORTURE or Threats of Torture.
It was some serious misunderstanding which was resolved amicably.
You are right about cues. Africa for the better part may be too rough for the cues to be any reliable. The fact that an FBI veteran with 13,000 interrogations can arrive at this conclusion is startling