Answer: The investigator can conclude that the suspect may just be lying
Explanation:
There are quite a few signs or gestures that can help to reveal someone's intent or actions. It is these signs or gestures that investigators find very useful in finding out if the suspect is actually being truthful or being economical with the truth.
One of such signs that tells the investigator that the accused is not being truthful is:
***when he or she (the accused) starts wiping his or her lips with fingers.
*** When the suspect repeatedly strikes his or her chin.
*** When the suspect during the interrogation often used an object to cover his or her mouth or uses his or her hand to cover the mouth.
All these are signs that could mean that the suspect is probably lying to the investigators. Experts and psychologists believe that the covering of the mouth is an unconscious effort to stop other people from listening to the falsehood or lie that is about to be uttered.
They do this in an attempt to hold back their words because they know they are untrue.