From: No One Trips Over a Mountain: Enhancing Officer Safety By Doing the Little Things Right
The most important word in a roadside interview is “What.” When he says, “What?” you got him and he is getting ready to lie.
Officer: Where are you coming from?
Motorist:The city.
Officer: How long were you there for?
Motorist: Only 1 hour.
Officer: What were you doing?
Motorist: Shopping.
Officer- Did you buy any marijuana?
Motorist- What?
All of the sudden, he can’t hear? He seemed to be hearing just fine. He bought marijuana.