off-topic reply hidden, might make a good off-shoot thread. {WE?}
Body language is notoriously unreliable at revealing deceit
https://irc.queensu.ca/the-myth-of-body-language-as-a-credibility-assessor/
Specifically, Bond and DePaulo (2006) conducted a meta-analysis regarding body language as a predictor of deceitful behaviour and found no relation between the two. In a separate meta-analysis conducted by Sporer and Schwandt (2007), twelve observable behaviours, including eye blinking, gaze aversion, postural shifts, hand movements, etc., were reviewed, and none were found to be correlated with deception. Three additional studies conducted by Wiseman et al. (2012) evaluated whether eye movement is a useful predictor of lying, with all three concluding it was not a useful predictor at all.