Nick Cannon I Was Onto 'AGT' Stutterer From the Beginning

6/11/2012 10:24 AM PDT

Nick Cannon -- I Was Onto 'AGT' Stutterer from the Beginning


Nick Cannon
KNEW something was up with stuttering "America's Got Talent" fraud Timothy Poe from the get-go -- telling TMZ, one glaring clue gave the guy away ... the night of his audition.

You've all seen the footage ... Timothy Poe put on a stuttering spectacle last week on the "AGT" stage -- claiming he developed his speech impediment from war injuries. TMZ showed you his story was holier than the Pope.

And last night in L.A., Nick told us he had a gut feeling Timothy was a fraud too -- as soon as the guy stepped off the stage -- because once the cameras were off him ... Tim stopped stuttering.

Nick's first thought was Tim was so emotional he didn't have to stutter -- but looking back, Nick said, "I think he was so caught up in the moment he FORGOT to stutter."