Has Robert Wagner told police everything he knows about Natalie Wood's tragic death? In a blockbuster world exclusive, a top lie detection expert tells Breaking Celebrity News he believes that Wagner may not have been entirely truthful during interviews and engineered a three-decades-long cover-up about the mysterious drowning of the screen siren.

Famed lie detection expert Michael Sylvestre used a special truth-detecting device to scrutinize a series of confessions made by the H