You cite wiki and ask others for 'evidence?'<quoted text>
Then I suppose you have evidence of three questions and "poorly" administrated testing. Wiki has four sources about the test and I didn't see one where I read there were only three questions nor criticizing on how the test was done.
george zimmerman voice stress analysis...will take you to two dozen articles about that evening and how sloppy police work has created a morphodite of a criminal case.
Ask yourself why SPD would administer a quickie voice stress test yet not run a back ground on George, not ask him to submit to blood screening and give him a pass on going to the hospital when he was obviously injured? Ask yourself why the SPD had no clue that GZ was using highly addictive mood drugs until he himself blurted it out as an excuse for not knowing where he was while speaking with the dispatcher? Ask yourself why SPD had no idea that George's truck was at the scene and didn't inspect the vehicle that evening?