Charlatan

I'm thinking Gotcha! with Anthony Edwards and Linda Fiorentino (http://www.imdb.com/title/tt0089222/)

or maybe

Kindergarten Cop (but I don't think the film is old enough)...

I too have been saying this for ever... since definately the 80s and definately with a Russian acccent...

Personal Best? no.

__________________
"My hands are on fire. Hands are on fire. Ain't got no more time for all you charlatans and liars."
- Old Man Luedecke